I just purchased the new 60gig ipod and before I open the box and go nuts with it, I want to understand somethings first. I plan on putting a lot of music on this thing quickly. I have 3 computer that all have different music on each computer. I want to be able to upload all the music to my ipod. I have heard that there is some tricks with itunes and ipods. I have heard that plugging my ipod into one computer, then into another (both using itunes) that I can loose all of my music doing so if I don't change a setting itunes. What setting is that? Also my brother has his own ipod, can he upload music from the same computers, same music? All the music I have are from cds I have imported to the computers, none of it is from itunes music store. Would that even make a difference?