I'm used to putting custom firmware for a fat psp but I just got a slim iced daxter bundle psp with 3.71 firmware I researched on how to upgrade it to custom 3.71 m33 firmware and found that its necessary to use the pandora method but there are so many guides and links floating around whenever I use the search function that it's hard to know what is reliable. I basically have a fat psp with custom firmware and I know I need to mod the battery but I need to know some more specifics about this. 1) If I hardmod the fat psp battery to pandora, will it still be usable after I'm done with the SLIM PSP 3.71m33 firmware update. And What I mean is, Will the fat psp battery be usable again in the Fat PSP like it normally would? (it's not my psp and I'd like to return it @_@) 2) I know I need a memory stick of atleast 1gb, but no more than that. After I do what I need with that memory stick, will I be able to use that like normal again? 3)I see many guides when I try to do a search but if I decide to do this, are there any guides that are reliable and specific as to make sure that everything I do is correct. I have updated to custom firmware in 2 other fat psp's but this is my first time doing a SLIM PSP and I'd like to make sure I don't brick or mess up any psp. Remember that I am Trying to get custom firmware for my "Slim PSP 3.71ofw "