Alright so I left PSP gaming when the PSP slim as released. Now I'm coming back, I have a fat PSP(Original model PSP-1001) and a pandora battery that I hardmodded myself. What's the latest and best custom firmware to install on my PSP?(I can downgrade back to the original firmware if I need to) Also, can I use my hardmodded battery as regular battery if I want to? Thanks a lot guys!