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.