http://forums.maxconsole.net/showthread.php?t=46449
And here it is! The PSP Firmware v3.03 DOWNGRADER has now been released by the 'Noobz' team. If you're not interested in downgrading, Noobz has also also released a v3.03 homebrew enabler. By running HEN, it installs a patch in your PSP's memory, that allows you to run homebrew almost as if you had a v1.5 PSP. The requirements for the HEN v3.03 are the same as the downgrader!
Official Noobz v3.03 Downgrader and HEN
- 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. See here for some info on how to check if your version is patched. 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.