FERROX 4.55 v2.01 NOBD - June / 09 / 14
PUP MD5: 1147DF2A5B13032843B651C20FB5E8C3
Features of this CFW
    Built on the basis OFW 4.xx
    Disabled the coreOs and control ECDSA
    LV1: patched to remove the protection LV2
    LV1: patched coreOs Hash Check (prevents the brick consoles downgradate not dehashed)
    LV1: Peek & Poke
    LV2: Peek & Poke
    Compatibility PS2 Games
    Compatibility PSP Games Remastered
    Compatibility Games PSP Minis
    Key 4.xx (start games with keys 4.xx EBOOT / sprx)
    PSN / SEN Enabled.
    RSOD Screen Bypass for consoles suffering from RSOD
    PS3 BT Remote Patch
    PS3 BluRay DISC patch
    Compatibility with the latest version of the REACTPSN
    App_home/PS3_GAME *
    Install Package Files *
    Ability to Downgrade from OFW 3:55 with QA enabled.
    Upgradeable from any CFW's
    Support InGame XMB ScreenShot Feature
    Supports Remote Play Feature
    Stability as nell'OFW 4.xx
    Ability to downgrade from any custom firmware with QA enabled.
    Full BD No Patch (you can start any homebrew / game without the aid of BluRay) Thanks zecoxao 
STRONGLY RECOMMENDED: It's recommended for proper installation of custom firmware, run:
    Restore File System (Recovery)
    Rebuild Database (Recovery) 
So, you will have a clean install and you will not have problems. (Thanks to franci97 & SonyForever)
DOWNGRADE:
If you eventually want to downgrade from any version of CFW FERROX 4.x to an OFW CFW 3.xx or 4.xx, you have the foresight to have installed the first qaflag and set the DEBUG SYSTEM UPDATE "ON".
(For all those who incur 8002F157 error, it means you have not activated the MODE 'ON DEBUG ON qaflag through and then have to do the deashing on the console)
I remind you that, even if the CFW's has been tested by many users, it OpenModding.net the developer will take responsibility for any damage caused to your PS3.
To correct this error: Install CFW 4:21 Rebug or CFW that allows you to activate the qa flag and the mode 'debugging. Upgrade to OFW 3:55 for two times in a row. (That's right, to install RECOVERY twice the OFW 3.55. Proceed with the installation of any other CFW's)
I remind you that the starting point of this custom firmware is 3:55 Original Firmware or any custom firwmare ..