Finally, a downgrader for anyone on firmware 3.03! The Noobz have some rules for using this:

• 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.


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).

Carefully read all of the instructions in the Downgrader_HOWTO.txt file included.

Download from Noobz