hi, i've searched and i didn't get my answer. i have a mac at home and a pc at work. i want to be able to use my ipod on the mac only. but i do want to be able to take files home from my pc to use on the mac. maybe even lossless tracks. the pc at work rips everything, but the mac has problems with the odd disc. (iBook).. is there a problem with this..? does the Nano work as just an external flash HD..? also, does it mess it up to be used between a mac and a pc..? any help appreciated.