PSP-Hacks.com
3.50 Firmware Downgrader
Filename: Downgrader350_All_Unpatched.zip
Size: 1.15MB
Downloads: 108,683
Description:
The N00bz' PSP 3.50 Firmware downgrader. Please read "Downgrader_HOWTO.TXT" before proceeding. Requires a legal UMD copy of Lumines (any unpatched version / region). Downgrade at your own risk!
If you have a TA082+ motherboard and you downgrade to 1.50, currently you will be unable to upgrade to 3.30+ Sony firmware. This is due to Sony blocking updates when the PSP has been modified to run 1.50. There will be an application released later which will allow users to revert the changes. If you are using a TA082 motherboard then I would suggest just using 1.50 or OE until an application is released.