I need some help with my psp current version.

A couple of months ago, I used a program to trick the psp into thinking it was version 2.5, but the psp I have is a 1.5 . Now, I can't play no psp games or any emulators, how do I get it back to version 1.5, can someone help me out.

can someone help me out?

details would help. what program did you use?
so your fw is currently 2.5? not a ta082, right?
i'd say upgrade and then downgrade. it sounds
like you can't boot a umd- so you won't be able
to upgrade that way. you'll have to download
the eboot fw dump from www.psp-hacks.com

if you were kern, you'd have gotten plenty of help

pm me if you want. i could probably sort you out.