PSP and UAE

[SamOS39]

You need to downgrade and since you have a firmware higher than 3.7 the only way you can downgrade is with pandoras battery ..
so ive read..
I am in the same situasion but i havent had chance to try this out.

Pandoras battery is a software that resets the piece of memory built into the battery, the only wayto do it though is to borrow a friends PSP (downgraded), and stick the your battery in it and run the software.
once the software is finished .. you take the battery out andput it backinyour one, load up and hey presto youve downgraded ..

I havent tried it myself though this is only fromwhat i have read ..

I think your asking on the wrong forum though ..

[SamOS39]

snap!  :-D
but i forgot to mention that slimline and the older ones are different  :roll:

I have a bulky one with firmware version 3.90 ..

you seem to know more than me, theres a PM coming your way soon  ;-)