I hope i don't ask a question that allready have been asked but i just wanted to make sure i'm doing everything right.

I have a white 2.5 Japanese PSP. It's not TA-082 (or whatever that bad PCB was). My question is, could anyone tell me what i need to do to downgrade. Do i need to update to 2.6 first, what files do i need to get and what firware (does it matter if it's the JAP one or not)

Please reply.

Thanks to anyone that replies in advance.