Here are some links
http://forums.qj.net/f-psp-pandora-discussion-207/t-guide-make-the-perfect-pandoras-battery-124530.html
(you have to register)
http://www.pspmod.com/forums/custom-firmware/
(quite a few places to check there)
https://www.youtube.com/watch?v=BTGmaTYGC2U
https://www.youtube.com/watch?v=P1ZGX8ymxns
(they go together)
top one first then the bottom onehttp://www.acidmods.com/forum/index.php?topic=8630.0
(Pandora compatability)
http://www.acidmods.com/forum/index.php?topic=8629.0
(Pandora How To)
Enjoy!