quick question, I am buying a new ipod photo 30gig and am selling my 3rd gen 20 gig ipod to my cousin. She has a pc, I a mac, Since the IPOD photo comes with the USB 2 port, and my IPOD has a firewire, would it be possible to switch the 2 cords? would my old cord work on my new Ipod and would the new cord work on the old ipod?