PS3 - CFW 4.91.2 Evilnat Cobra (8.5) BETA5 (CEX/DEX/PEX/D-PEX) (2024)

4.91.2 EVILNAT (Cobra 8.5) BETA5​

• Made out of 4.91 OFW (CEX)
• Ported Kernel and some modules from OFW 4.84 DEX
• Made manually without automatic tools
• PSN/SEN enabled
• Fixed layouts 272/480 from OFW 4.90
• Disabled deletion of unsigned act.dat and .rif files
• Allowed unsigned act.dat and .rif files
• Allowed running of unsigned applications
• Compatibility with FSELF
• C00 demo unlocker
• Disabled LIC.EDAT license check
• Can be installed over 3.55 OFW
• Can be installed over +3.56 OFW (bguerville Toolset)
• Can be installed over any CFW CEX
• Cobra 8.5 added and enabled as default
• Full PS2 Games Compatibility
• Possibility of Downgrade from any CFW with active QA Flags
• QA Flags active if previously enabled
• Disabled Epilepsy Message on Boot
• Compatibility with PSX/PSP/PS2 games in ISO
• Compatibility with PS3 games in ISO/JB folder format
• Compatibility with ReactPSN
• Display of Temperatures in XMB In-Game on PS2 Games
• RSOD Screen Bypass
• BSOD Screen Bypass
• PS3_GAME/app_home
• XMB In-Game Screenshot
• Added Package Manager
• CoreOS Hash Check patched to prevent Brick on non-dehashed Downgradate consoles
• Patched to remove LV2 Protection
• Peek and Poke (LV2)
• Peek and Poke (LV1)
• CINAVIA protection disabled
• Option to sort games by name and date
• Allow to use 3rd party controller in Recovery Menu
• Compatibility with OtherOS
• Disabled update from OFW PUP in Recovery Mode
• Dualboot compatible
• Allowed installing of retail PKG on DEX
• Allowed installing pseudo-retail PKG
• Enabled [★Unlock], [★Lock], and [★Delete] options in Trophies
• Compatibility with Remote Play
• Added gameboot_multi.ac3
• Deleted gameboot_stereo.ac3 and coldboot_stereo.ac3
• Replace "Unlink" with "Delete Folder" in XMB
• Bypassed PAL broadcast error on BD/DVD movies
• Bypassed all error codes on BD/DVD movies
• Enabled Debug menu in PS2 games (ps2_netemu.self)
• Patched CBOMB issue
• Target Manager patched to show version 4.9.1

• Failsafe Cobra stage2 (by bguerville/aldo)
• Restore CFW Syscalls without reboot just entering to 'Settings > System Update' on XMB (by aldo)
• Integrated Dynamic Control FAN (to control fan when webMAN is unloaded) (by aldo/Evilnat)
• Support Photo GUI integration with webMAN MOD (mount games from 'Photo' column) (by aldo/DeViL303)
• Get/Set FAN speed (by aldo)
• Enable/disable features: Photo GUI, Restore Syscalls (by aldo)
• Opcode to create CFW Syscalls (6, 7, 8, 9, 10, 11, 15, 35) (by aldo)
• Opcode to create license (RIF) (by Evilnat)
• Updated ps3mapi_load_process_modules to load custom modules and system modules (by haxxxen)
• Added ps3mapi_get_process_module_info
• Increased from 24 to 32 the max number of map paths (by aldo)
• Added sm_get_temperature patch in kernel (by Evilnat)
• Added sm_get_fan_policy patch in kernel (by Evilnat)
• Added sm_set_fan_policy patch in kernel (by Evilnat)
• Added support for REDUMP ISOs decryption on-the-fly (by Evilnat)
• Opcode to toggle coldboot animation (by Evilnat)
• Opcode to toggle epilepsy warning (by Evilnat)
• Opcode to toggle gameboot animation and sound (by Evilnat)
• Opcode to toggle hidden trophy info (by Evilnat)
• Target Manager fix for DEX (By haxxxen)
• Fixed Control FAN payload, avoids loading previous mode (by Evilnat)
• Disable stage2.bin while Recovery Menu is loaded (by haxxxen)
• Fixed max FAN speed after shutdown (by Evilnat)
• Fixed black screen in CFW2OFW converted games (by Evilnat)
• Added sm_ring_buzzer with single_beep, double_beep and triple_beep (by Evilnat)
• Skip license creation (rif) if it already exists (by aldo)
• Opcode to toggle PS2 icon (ISOs/BIN.ENC) in XMB (by Evilnat)
• Added cellFsMkdir symbol (by Evilnat)
• Added constant FAN Speed while a PS2 ISO is launched (by Evilnat)
• Creation of fake act.dat while launching a PSN game (by Evilnat)
• Block Log In on PSN/SEN when CFW syscalls are enabled (by DeViL303)
• Toggle OFW Mode on Boot (by aldostools and Evilnat)
• Block of PSP Launchers if a PSPISO has not been mounted (by aldostools)
• Small optimizations (By aldostools)
• Removed "unnecessary" code (By aldostools)
• Opcode to toggle gameboot (By Evilnat)
• Opcode to toggle coldboot and sound (By Evilnat)
• Opcode to toggle epilepsy warning (By Evilnat)
• Added cellUsb000_mount_symbol (By haxxxen)
• Added usb_flag and no_cobra flags (By aldostools and Evilnat)
• Load external stage2 and plugins from /dev_usb000 (By aldostools, haxxxen and Evilnat)

• Portuguese: @jcorrea and @LuanTeles
• Polish: @KcrPLo and @Agrippa and HackZy01
• Italian: @Sheireen
• Spanish: Evilnat
• Chinese Traditional/Simplified: @xiaoyang
• Japanese: @Kyan_dudl
• Russian: @MrYadro
• French: @EimGdt and @Chronoss09
• German: @FadedHD3

• CECH-2000A
• CECH-2000B
• CECH-2001A
• CECH-2002B
• CECH-2003A
• CECH-2004A
• CECH-2004B
• CECH-2012A
• CECH-2104B
• CECH-2500A
• CECH-2501A
• CECH-2504A
• CECH-2511A
• CECH-2511B
• CECH-L04
• CECHA01
• CECHE01
• CECHB01
• CECHC04
• CECHG01
• CECHP01
• CECHM

These options are in XMB's Network tab under [★ Custom Firmware Tools] option:

Power Options

• Turn Off: Turns off the PS3
• Hard Reboot: Reboots the PS3 completely
• Soft Reboot: Reboots the PS3 softly
• Reboot LV2: Reboots the LV2

• Internal Hard Disk Drive 0: Manage PS3 files in /dev_hdd0
• Internal Hard Disk Drive 1: Manage PS3 cached files in /dev_hdd1
• USB Mass Storage Devices: Manage files on your USB devices
• Internal Flash Memory: Manage PS3 internal flash files
• Optical Disc: Manage optical discs
• Memory Cards: Manage memory cards

• Decrypt 3k3y/Redump ISOs (HDD): Decrypts 3k3y/Redump ISOs from dev_hdd0/PS3ISO with 'd1/disc' key file if it is available
• Decrypt 3k3y/Redump ISOs (USB): Decrypts 3k3y/Redump ISOs from dev_usb/PS3ISO with 'd1/disc' key file if it is available
• Fix CBOMB: Patches RTC with static value (default) or current updated PS3 system date. Useful for PS3 with dead CMOS battery
• Show Total PS3 Usage: Shows the total days that the PS3 has been on, number of times it has been turned on and off
• FAN Speed: Shows current FAN speed
• PS3 Temperature: Shows current CPU and RSX temperature in Celsius and Fahrenheit
• Check GPU/VRAM clock speed: Checks current GPU/VRAM clock speed
• Show IDPS: Shows current IDPS
• Show PSID: Shows current PSID
• Show IP: Show current IP if it exists
• Toggle DLNA: Allows you to share content between devices through your home WI-FI network
• Toggle Coldboot: Toggles between custom/original coldboot.raf
• Show XAI Version: Shows the current version of xai_plugin

• Show Region Info: Shows current DVD TV mode and BDVD/DVD/PS3 region
• DVD TV System: Switch between PAL and NTSC for DVD Movies
• Backup xRegistry.sys: Creates a backup of xRegistry.sys to /dev_usb or /dev_hdd0
• Button Assignment: Switches O and X buttons

• Default/Disabled: Sets BDVD/DVD/PS3 region to Default in xRegistry (0x00)
• Japan: Sets BDVD/DVD/PS3 region to Japan in xRegistry (0x83)
• USA: Sets BDVD/DVD/PS3 region to USA in xRegistry (0x84)
• Europe: Sets BDVD/DVD/PS3 region to Europe in xRegistry (0x85)
• Korea: Sets BDVD/DVD/PS3 region to Korea in xRegistry (0x86)
• United Kingdom: Sets BDVD/DVD/PS3 region to United Kingdom in xRegistry (0x87)
• Mexico: Sets BDVD/DVD/PS3 region to Mexico in xRegistry (0x88)
• Australia: Sets BDVD/DVD/PS3 region to Australia in xRegistry (0x89)
• Asia: Sets BDVD/DVD/PS3 region to Asia in xRegistry (0x8A)
• Taiwan: Sets BDVD/DVD/PS3 region to Taiwan in xRegistry (0x8B)
• Russia: Sets BDVD/DVD/PS3 region to Russia in xRegistry (0x8C)
• China: Sets BDVD/DVD/PS3 region to China in xRegistry (0x8D)
• Hong Kong: Sets BDVD/DVD/PS3 region to Hong Kong in xRegistry (0x8E)
• Brazil: Sets BDVD/DVD/PS3 region to Brazil in xRegistry (0x8F)

• Off: Turns off the PS3's power LED
• Red (Static): Sets the PS3's power LED to static red
• Green (Static): Sets the PS3's power LED to static green
• Yellow (Static): Sets the PS3's power LED to static yellow
• Red (Slow blink): Sets the PS3's power LED to slow blink red
• Green (Slow blink): Sets the PS3's power LED to slow blink green
• Yellow (Slow blink): Sets the PS3's power LED to slow blink yellow
• Red (Fast blink): Sets the PS3's power LED to fast blink red
• Green (Fast blink): Sets the PS3's power LED to fast blink green
• Yellow (Fast blink): Sets the PS3's power LED to fast blink yellow
• Yellow + Green (Fast blink): Sets the PS3's power LED to fast blink yellow + green
• Yellow + Red (Fast blink): Sets the PS3's power LED to fast blink yellow + red
• Yellow + Green (Slow blink): Sets the PS3's power LED to slow blink yellow + green
• Yellow + Red (Slow blink): Sets the PS3's power LED to slow blink yellow + red
• Rainbow Mode: Sets the PS3's power LED to rainbow mode
• Special Mode 1: Sets the PS3's power LED to special mode 1
• Special Mode 2: Sets the PS3's power LED to special mode 2

• Single Beep: Generates a single beep with the internal buzzer
• Double Beep: Generates a double beep with the internal buzzer
• Triple Beep: Generates a triple beep with the internal buzzer
• Continuous Beep: Generates a continuous beep with the internal buzzer

• Control FAN Mode: DISABLED: Disables Cobra’s Control FAN
• Control FAN Mode: SYSCON: Allows the PS3's SYSCON to control FAN speed
• Control FAN Mode: MAX: Set Cobra FAN speed to 0xFF

• Maximum temperature: 60°C: Sets the fan speed dynamically to keep the system at a maximum temperature of 60°C
• Maximum Temperature: 65°C: Sets the fan speed dynamically to keep the system at a maximum temperature of 65°C
• Maximum Temperature: 70°C: Sets the fan speed dynamically to keep the system at a maximum temperature of 70°C
• Maximum Temperature: 75°C: Sets the fan speed dynamically to keep the system at a maximum temperature of 75°C

FAN Tools > Manual Speed

• Manual Speed: 40%: Sets the fan speed statically at 40% (0x67)
• Manual Speed: 45%: Sets the fan speed statically at 45% (0x75)
• Manual Speed: 50%: Sets the fan speed statically at 50% (0x80)
• Manual Speed: 55%: Sets the fan speed statically at 55% (0x8E)
• Manual Speed: 60%: Sets the fan speed statically at 60% (0x9B)
• Manual Speed: 65%: Sets the fan speed statically at 65% (0xA8)
• Manual Speed: 70%: Sets the fan speed statically at 70% (0xB5)
• Manual Speed: 75%: Sets the fan speed statically at 75% (0xC0)
• Manual Speed: 80%: Sets the fan speed statically at 80% (0xCE)
• Manual Speed: 85%: Sets the fan speed statically at 85% (0xDA)
• Manual Speed: 90%: Sets the fan speed statically at 90% (0xE7)
• Manual Speed: 95%: Sets the fan speed statically at 95% (0xF4)

FAN Tools > PS2 FAN

• PS2 Fan Mode: DISABLED: Disables Control FAN on PS2 game
• PS2 Fan Mode: SYSCON: Allows the PS3's SYSCON to control FAN speed on PS2 game
• PS2 Fan Mode: 40%: Sets FAN speed to 0x66 on PS2 game
• PS2 Fan Mode: 50%: Sets FAN speed to 0x80 on PS2 game
• PS2 Fan Mode: 60%: Sets FAN speed to 0x9A on PS2 game
• PS2 Fan Mode: 70%: Sets FAN speed to 0xB4 on PS2 game
• PS2 Fan Mode: 80%: Sets FAN speed to 0xCE on PS2 game
• PS2 Fan Mode: 90%: Sets FAN speed to 0xE8 on PS2 game

QA Tools

• Check QA Flags: Check if QA flags are enabled or disabled
• Enable QA Flags: Enables QA Flags
• Disable QA Flags: Disables QA Flags

• Cobra Information: Shows current Cobra information
• Check Syscall 8: Checks Cobra's Syscall 8 status
• Create Syscalls: Create syscalls 6, 7, 8, 9, 10, 11, 15 and 35
• Enable PSN Protection: Blocks PSN login when syscalls are enabled
• Disable PSN Protection: Enables PSN login when syscalls are enabled
• Enable FTP: Enables FTP connection in port 21
• Disable FTP: Disables FTP connection
• Enable TrophyUnlocker: Enables TrophyUnlocker INGAME plugin
• Disable TrophyUnlocker: Disables TrophyUnlocker INGAME plugin
• Allow Restore Syscalls: Allows restoring syscalls through "System Update"
• Skip license creation: Skips overwriting license file (RIF) if it already exists
• Create license: Creates RIF licenses from RAP files from "x:\exdata"
• Toggle Plugins: Enables/disables Cobra plugins from /dev_hdd0/boot_plugins.txt
• Toggle OFW Mode on Boot: Toggles between CFW syscalls on boot: enabled, disabled and partial
• Toggle PS2 Disc Icon: Toggles between default and blue PS2 disc icon in XMB
• Toggle Gameboot: Enables or disables original PLAYSTATION 3 gameboot when starting a game or application
• Toggle Hidden Trophy Info: Enables or disables hidden trophies title, details and icon in XMB/INGAME
• Toggle Coldboot Animation: Enables or disables the coldboot animation and sound on boot
• Toggle Epilepsy Warning: Enables or disables epilepsy warning on boot
• Toggle External Cobra: Enables/disables loading external Cobra payloads and plugins from /dev_usb000
• Toggle Cobra Version: Toggles between release and debug versions (reboot is required)
• Toggle Cobra: Enables or disables Cobra (reboot is required)

• Disable Syscalls: Disables syscalls and remove history files
• Spoof TargetID: Spoofs current TargetID in LV2 with EID5's TargetID
• Spoof IDPS: Spoofs IDPS in LV2 with a valid IDPS from "/dev_usb/IDPS.txt"
• Spoof PSID: Spoofs PSID in LV2 with a valid PSID from "/dev_usb/PSID.txt"
• Spoof MAC: Spoofs MAC in LV1 with a valid MAC from "/dev_usb/MAC.txt"
• Show accountID: Shows current user's accountID
• Create accountID: Creates a fake accountID for current user's in xRegistry
• Overwrite accountID: Overwrites current user's accountID with a fake one in xRegistry
• Activate account: Creates act.dat file in the current local account
• Create license: Creates RIF licenses from RAP files from "x:\exdata"
• Backup activation file: Creates a backup of act.dat to /dev_usb or /dev_hdd0
• Disable account: Deletes current user's activation file act.dat permanently
• Convert savedata: Converts savedata from "/dev_usbXXX/PS3/SAVEDATA" to your own savedata

• View Log: http://localhost/dev_hdd0/tmp/cfw_settings.log (webMAN MOD is required for this
  function)
• Clean Log File: Resets /dev_hdd0/tmp/cfw_settings.log file
• Dump IDPS: Saves IDPS to log file
• Dump PSID: Saves PSID to log file
• Export RAP license: Exports the RAP license from the RIF licenses installed in the current user account in /dev_usb/exdata
• Dump LV2: Dumps LV2 to /dev_usb or /dev_hdd0/tmp
• Dump LV1: Dumps LV1 to /dev_usb or /dev_hdd0/tmp
• Dump Flash: Dumps NOR/NAND Flash to dev_hdd0/tmp or /dev_usb
• Dump RAM: Dumps RAM to /dev_usb or /dev_hdd0/tmp
• Dump SYSROM: Dumps SYSROM to /dev_usb or /dev_hdd0/tmp
• Dump EEPROM: Dumps 256 bytes of EEPROM data from offsets 0x2F00, 0x3000, 0x48000,
  0x48800, 0x48C00 and 0x48D00 in /dev_usb or /dev_hdd0/tmp
• Dump ERK: Dumps eid_root_key to /dev_usb or /dev_hdd0/tmp
• Dump SYSCON Error Log: Dumps current SYSCON error log in /dev_usb or /dev_hdd0/tmp
• Dump Token Seed: Dumps current token seed in /dev_usb or /dev_hdd0/tmp
• Log KLicense usage: Saves filename and klicensee to log file
• Log Secure File ID usage: Writes save data name and file ID key to log file
• Dump Disc Hash Key: Retrieves disc hash key from an ORIGINAL game disc

• LV1 Peek/Poke Support: Patch unused LV1 syscalls 182 and 183
• LV2 Memory Protection: Patch Shutdown on LV2 modification
• HTAB Mapping With Write Protection: Enable or Disable protected HTAB mapping
• Access to all INDI Info Manager Services: Enable or Disable INDI access
• Update Manager EEPROM Write Access: Patch Update Manager access to EEPROM
• Dispatch Manager Access: Patch Dispatch Manager access to all services
• Allow ENCDEC IOCTL Command 0x85: Enable IOCTL Command 0x85
• System Manager Ability Mask of GameOS: Allow access to all system manager services
• Extract all PKG Types: Allow Update Manager to extract all PKG types
• Full Access for Repo Nodes in Any LPAR: Allow create, modify, delete for repository nodes
• LV1 Full Access to MFC_SR1 SPE Register: Allow all-bit access to the register
• LV1 Access to set Data Break Points: Enable LV1 access with lv1_set_dabr()
• LV1 Access to GPU GART Memory: Allow LV1 to use 4KB IO page size
• Storage Manager ENCDEC Keys Access: Allow Storage Manager to clear ENCDEC keys
• Skip all ACL Checks: Enable skipping of ACL checks for all storage devices
• Initial GuestOS Loader: Enable GuestOS mode 1 for GameOS

OtherOS Tools

• Resize VFLASH/NAND Regions: Resizes VFLASH/NAND Regions 5 to allow OtherOS
• Install Petitboot: Installs Petitboot to VFLASH/NAND Regions 5 from USB device
• Set OtherOS Boot Flag: Reboots the PS3 and boot OtherOS
• Set GameOS Boot Flag: Fixes issues loading PS2 games when OtherOS boot flag is set

• Convert to CEX: Converts PS3 to CEX/RETAIL with eid_root_key from /dev_usb or /dev_hdd0
• Convert to DEX: Converts PS3 to DEX/DEBUG with eid_root_key from /dev_usb or /dev_hdd0
• Swap Kernel: Swaps between CEX and DEX Kernels
• Check TargetID: Checks current TargetID from EID0 and EID5
• Toggle Host Information on XMB: Enables/disables host information on XMB
• Toggle XMB Mode: Switch between CEX and DEX XMB
• Toggle Debug Settings: Switch between CEX and DEX Debug settings
• Show Information: Shows current Firmware, Kernel, TargetID, VSH, XMB Host and Debug Settings

• Display Applicable Version: Displays minimum downgrade version
• Check File System: Reboots and allows you to check and repair filesystem
• Rebuild Database: Reboots with Database rebuilding flag set
• Toggle Recovery Mode: Reboot to Recovery Mode (Not supported on NAND models!)

• RSOD fix: Re-initialize VTRM-Region to attempt to fix RSOD
• Toggle Factory Service Mode: Enter/Exit Factory Service Mode (DON’T INSTALL CFW ON FSM)
• Remarry Bluray Drive: Requires: Enter to FSM and copy "eid_root_key" to /dev_usb
• Toggle HDD Space: Unlocks/restores 8% extra total space on the PS3 internal HDD
• Show ROS Bank: Shows active ROS bank
• Check 8th SPE: Checks if 8th SPE is currently enabled or disabled
• Toggle 8th SPE: Enables/disables 8th SPE
• Enable VSH Debugging: Enables debugging vsh.self
• Enable Support for DEX OFW: Enables OFW DEX installation on converted PS3 Retail
• Disable Support for DEX OFW: Disables OFW DEX installation on converted PS3 Retail
• Load LV2 kernel: Loads lv2_kernel.self file from /dev_usb000 or /dev_flash
• Update xai_plugin: Updates xai_plugin downloading and installing a PKG from Evilnat's xai_plugin repository

• Download someone else’s savegame for your game of your choice
• Put the savedata in your pendrive in “X:\PS3\SAVEDATA” (pendrive must be in FAT32)
• Put in the pendrive in the PS3
• Select Network Tab > [★ Custom Firmware Tools] > PSN Tools > Convert Savedata
• Wait until the conversion finishes
• Once finished, copy your converted savedata throught XMB “Saved Data Utility (PS3)”
• Launch your game and load your new savedata

I recommend to use an empty account without trophies and savedata or an account without accountID.

To create a fake act.dat, Cobra 8.5 must be enabled, and your PS3 must have at least one account with a valid accountID and launch a game that requires a RIF/RAP license file.

Cobra will search a valid accountID in all existing accounts and create act.dat while the game is launched through the XMB. If no accountID is found, act.dat will not be created.

You can create a fake accountID (like reactPSN), to do this go to Network > ★ Custom Firmware Tools > PSN Tools and choose between “Create accountID” or “Overwrite accountID” (Be careful about the last option because if you already have a fake/real accountID it will be overwritten). It is recommended to use these options in an account that does not have an ID. The PS3 will restart if everything went well.

The tutorial would be the following:

• Download your purchased PSN game from PS Store
• Put game RAP file in “X:\exdata” or “/dev_hdd0/exdata”
• Launch your purchased PSN game
• Cobra will check if any of your PS3 accounts have accountID
• Faked act.dat will be created while the game is launching

• Make sure Cobra 8.5 is enabled
• Select Network Tab > [★ Custom Firmware Tools] > PSN Tools > Create accountID
• Select Network Tab > [★ Custom Firmware Tools] > PSN Tools > Activate account
• Launch your purchased PSN game
• Faked act.dat will be created while the game is launching

Block PSN log in

This method is developed by @DeViL303, it will only work with Cobra enabled, Cobra will block log in on PSN/SEN while the CFW syscalls are enabled, to enable it again you need to disable CFW syscalls completely (you can do it with webMAN MOD, psnpatch, SEN Enabler, etc…).

If you want to disable this feature, simply use the option Cobra Tools > Disable PSN Protection and you will be able to log in with syscalls enabled. To enable it again use the option Cobra Tools > Enable PSN Protection

• The accountID is directly linked to savedatas and trophies data. If you have trophies or savedatas in
  your current local account, THEY WILL BE CORRUPTED after setting FAKE accountID. To fix this, copy the
  savedata to the root of a USB, convert it and then copy it back through XMB in 'Game' tab. To fix
  corruption in trophies you need to delete it/them. Is highly recommended to do this on a local account
  without trophies/savedatas
• The FAN speed is constant when in a PS2 game, BE CAREFUL while selecting modes because it will not
  change after the PS2 game is loaded. It is also static when choosing a mode in the "Manual Speed"
  option. All current speeds in xai_plugin must keeping a correct temperature in CPU and RSX
• Do not rename vsh.self manually and ALWAYS use the option for it in xai_plugin, it can cause that the
  PS3 can't load the XMB when you have full version of webMAN MOD, DEX Kernel and CEX vsh.self. The
  CFW has a protection to avoid this
• If you want to install OtherOS on PS3's internal HDD you first need to go to Recovery Menu and select
  [Restore PS3 System], this will format the HDD and create a partition for OtherOS. Remember to make
  a backup of all your data before
• DON'T TRY TO SWAP KERNEL WHEN YOU HAVE LOADED AN EXTERNAL KERNEL FROM USB/FLASH!!
  This can cause brick and you may need a hardware flasher to repair the PS3
• You can unload Cobra/plugins if you have any problem with them, for this you need to go to Recovery
  Menu and then reboot the PS3, this will disable both
• It is recommended to ALWAYS activate the QA Flags, it is very important, it allows you to install CFW
  from versions prior to the one installed and also avoids issues
• If you can't dump or make an ISO of your game disc in multiMAN, go to mmCM tab and select [Switch
  to multiMAN mode], this will reboot multiMAN and now you will be able to dump/make an ISO of your
  disc
• OtherOS on PS3 with NAND is very dangerous if you don't know what you are doing (for example using
  the wrong image to install petitboot), it can cause brick and the only way to repair it is with a hardware
  flasher. PLEASE USE IT WITH CAUTION!
• Make sure you are installing the correct image for OtherOS. xai_plugin tells you what image need to be
  installed too. For NAND you need dtbImage.ps3.bin.minimal and for NOR dtbImage.ps3.bin. If the
  wrong image is installed, it can brick on NAND, needing a HW flasher to repair it, in NOR you can fix it
  formatting the HDD
• If your PS3 has a CFW noBD (in any of its variants) and latest versión of webMAN MOD (1.47.42 at the
  time of writing this guide), there are chances that the PS3 can’t read an external devices (/dev_usb000,
  /dev_usb001, …) in the next two minutes. To fix this, go to webMAN Setup page, click on webMAN
  MOD Setup and check noBD patch and reboot the PS3, now it may read external devices
• Enable FTP and Disable FTP can fail randomly, if you want to use any of them wait a few seconds before using any again.
• The option Check GPU/VRAM clock speed now should work fine without crashes
• In PEX and D-PEX versión some of the debug options pressing triangle are missing because a/some
  file/s hasn't been ported yet (needs a lot of research with XMB layouts, I have patched some of them
  but others not, for example, trophies entries are messed up), those options are (maybe more):
  • ★ Check
  • ★ Owner Information
  • ★ Cancel Purchase
  • ★ Performance Bar
  • ★ No Memory Limit

• If you have OtherOS/Petitboot installed it can created issues while loading PS2 games or rebooting the LV2, to fix this you need to use the option [OtherOS Tools > Set GameOS Boot Flag], now you can use the PS3 as always

• The CFW is meticulously tested and no bugs have been found, but that does not mean that there are
  any or that it fails at any specific time. If that happens, contact me as soon as possible so that I can
  solve it.
• It is recommended to use webMAN MOD, especially with some PSX games that have libCrypt (Dino Crisis for example), and for PS2 games

Thanks to @DeViL303, @Berion, @Brandon Stump, @jcorrea, @nhie07, @NSC-Modz, @LuanTeles, @thejavigames, @raidriar, @xiaoyang, @Zwei, @haxxxen, @RetroFan_90, @SpyroMancer, @patricksouza472, @MrYadro, @CFW-Us3r, @Andrio, @KcrPLo, @nur @Rakhmadi Rajab, @Lwiz, @Sheireen, @TheWizWiki, @A79266251, @EimGdt, @Kyan_dudl, @hackzy01, @kernaltrap, @wintr, @Paweł, @ORION_games_, @Mikeclan_, @MlK3YY_, @XxalexXrey, @MurilloMadriz, @ReinSertt , @vitormoraes1903 and all who helped me testing the CFW 4.91.

If I forgot someone, I apologize, there are many people in the PS3 scene and you are many people who
have helped me to test the CFW.