How do you downgrade a psp from version 3.11 to 1.5 or 1.0??
If you were 1.0 you’d need to upgrade to 1.5 before you install custom firmware. The only way you can downgrade from 3.11 is by using the game Lumines. To downgrade you will need: ——————————… PSP w/Full Battery and connected to power supply Sony’s Official 3.5 Upgrade 1.5 update 3.5 Downgrader Package 3.4 OE-A Custom Firmware Lumines game (buy it used at Gamestop for $20 before they run out and you have to pay $60 at ebay) ——————————… 1. Format Card 2. Copy Sony’s official 3.5 update into GAME/UPDATE folder in the PSP 3. Run update from game menu Firmware is now 3.5 4. Format card 5. Unrar contents of 3.5 downgrader 6. Rename 1.5 update from EBOOT.PBP to UPDATE.PBP 7. Place UPDATE.PBP in PSP/GAME/UPDATE folder (The one you just open, not the psp’s) 8. Ovewrite Memory card’s PSP folder with this PSP folder 9. Run LUMINES game (game will run and reboot itself) 10. After game reboots, check firmware version to make sure HEN is running (go to sys
