I dunno, have you tried logging in on new PC with account?
I don't believe so, so just either put the files on a flash drive, or email them to yourself. :)
sorry, what does QFT mean? i'm stupid :P
QFTOr, if you have an iPod, you could sync EVERYTHING to your iPod, and then plug it into your new comp, and sync them to iTunes.
QFT = Quoted For Truth