okay, so i am not so familiar with the psp series. can anyone fill me out on: are there any different types of psp games (a parallel is gb vs gbc vs gba) if I go down and buy a psp 3000 at the store, what do i need to do to be able to play homebrew/backups or install a custom firmware? how can I downgrade form firmware 6.10 to a prev. version? what memory stick should i get (specs you recommend) can anyone either answer me directly or link me to a topic or an off-site page? do i need to hardmod a psp 3000 battery to get the custom firmware istalled? can i do this without a soldering iron? will purchaced pandora batteries (from dealextreme, etc.) work on the psp 3000? also, tell me anything else you think i should know. much appreciated.