err... false hope? there is no downgrader for 3.03 yet
wait my bad pwnege
They said it was coming within the week, and as promised, here it is! The long awaited 3.03 easy-to-use downgrader!
The almighty Noobz have laid out some specific ground-rules:
This downgrader is for v3.03 firmware only. But if you have v2.81 - v3.02, no problem - you can just upgrade to v3.03 to use the downgrader.
You need a copy of the unpatched GTA:Liberty City Stories UMD. No ISOs, no patched UMDs, not Vice City Stories. The most reliable way: the unpatched disks have the v2.0 firmware update on them.
This downgrader is intended to enable homebrew. Homebrew is NOT the same as piracy. Don’t be a thieving loser - buy the games you play.
The downgrader will work on all current PSP hardware (TA-079 - TA-086). Patching of TA-082+ is automatic in the downgrader.
You downgrade at your own risk. There is always a chance of bricking, although we have done everything we can think of to make this process safe.
Everything you need to know concerning a successful downgrade can be found in “Downgrader_HOWTO.txt.” Read them carefully!
Also, for those who fear messing with their PSP’s flash, can take advantage of the full homebrew experience with Homebrew Enabler (HEN) for 3.03. “HEN 303 - the Duff release” works in the same manner as Dark_AleX’s HEN. The requirements: a firmware 3.03 PSP and an unpatched version of Grand Theft Auto: Libery City Stories. Details on installation and usage are inside README.txt.
Warning: After downgrading from 3.03 to 1.5, there are some remnants of 3.03 left in flash. If you later try to re-upgrade to 3.03 and repeat the downgrade, things will break. At some later point, we will work on a cleaner that will remove these extra files. Until then, enjoy! (Don’t worry, upgrading to 3.03 OE firmwares still works fine).
DOWNLOAD HERE
1.5 EBOOT
3.03 EBOOT update from 2.81-3.03 if needed
3.03 HOMEBREW ENABLER FINAL