Erm, I just wanna ask. If i upgrade my PSP 1.5 (downgraded before recently and it is TA-82), and then upgrade it to 3.03oe-c, would i still be able to play GBA games? (which i cam playing right now)

Furthermore, which version does PSP roms is playable. And where to download them from? (if it is illegal to say, then ignore this question)