UPDATE: HOW TO DOWNGRADE TO 4.30 Rogero NEVER ON 3.55
300XX and 400xx models are not downgradable, they have a different files running and do not have the same files that are modified to hack you older slims and phats.
300xx models can be backed up and rewritten but if modified in any way will not work.
you only need
*a dongle/ example: e3 card reader
old slim models below 250XX example 2501, 2502, 2503
e3 does not work on models below and starting at CECHG0x-CECHA0x example CECHA01, CECHG03 are nands
E3 flasher does not have to be plugged into the hdd slot to work, it receives all power from the nor clipped successfully to the nor.
files needed for safety and to proceed - http://rapidshare.com/files/17563396...20e3flasher.7z
ps3 usb links after e3 nor editing -
e3 back up checks links-
e3 step 1 - switch pup's with rogero's 4.30cfw v 2.03 - my link has it set ready
e3 step 2 - lv2diag out of factory mode
ps3 nor dump patcher to fix bad back ups
e3 downgrade.bin - makes the e3 flasher rewrite the nor to allow factory mode access
update.bin - its the samsung version of the e3flasher firmware allows multi console downgrades. more than one console in other words
flowrebuilder - decrypts the backups to look and make sure its good
here is proof ^ of me downgrading to 4.30 cfw no 3.55! my video is not cut but speeds up through the middle since it takes almost 2 hours to prove this. you see every time i drop the camera fix the e3 and finish the downgrade straight to 4.30 cfw roger v 2.03 which you will KNOW ITS SPOOFED TO 4.31, you can see the install pkg/lastgame icon after downgrading.
tut installing e3 flasher
hints! the e3 flasher always has the ribbon starting under the nor words
always test your back ups and even use flowrebuilder 4.2.2 to reverse decry-pt to make sure your back up was good.