Thanks for your reply back Kev. Everything is very clear to me now. Just one little confusion. I have had a look at google for TA-82 as per the image (
http://img106.imageshack.us/img106/4...82spot1bm3.jpg) and i can't see any such numbering but on the left side of my PSP it says IC9001. Is it a TA-082? Can this be downgradable? if yes then how? Thanks mate.
*** EDIT ***
Someone also suggested me using this link
PSP Downloads | PSP Upgrading & Downgrading AIO
Is this any good?