well i friend gave me his psp slim which is a 2000 model, but still somehow i cannot get custom firmware install to work. I dunno if its one of those with the mother board version that won't do but well i will explain the problem. I tried several ! of those easy install programs to make a magic memory stick and put it into his psp slim, than put in the pandora battery he bought while holding L button and still screen remained black nothing happened. so where could be the problem ? i don't think each of this easy installer and so on did not work, so is it possible that the pandora is "broken"? or maybe not charged enough ? ----- well just tried the mms and the pandora on my psp phat and it showed up but still on the lite it remains black screen ?