I just got a new MacBook Pro for college. I want to transfer all my songs to my laptop so I can update my ipod from this computer. I used the home sharing thing to get all my songs on here but when I plug my ipod in to my laptop it wants me to erase everything on my ipod. I want to transfer all my playlists and apps as well. Right now my purchased playlist on my new computer is blank. How do I make my new computer my ipod's new computer?