Downgrade questions

[shahrjerdi_ali]

i have a psp version 2.81, how can i downgrade to 2.71? do i have to upgrade to 2.82 or 3.30 then downgrade from one of them.

p.s i need firmeware 2.71 to play iso games

[Nicko01]

1. You don't need 2.71 to play iso games, you need the latest OE firmware (3.40 OE).
2. ISO's are ILLEGAL! You can not talk about them here.
3. You need GTA:LCS Unpatched with the 2.0 update on it to downgrade. You first need to update to 3.03. go to noobz.eu to find out how to downgrade and dax.st for the oe firmwares.