I have 2 computers that I play my music through in my home. I have around 160gb of music so I don't want to fill up both hard drives. When I plug in my ipod to the computer that doesn't have the music files itunes comes up and I choose do not sync and my ipod appears in the device column. When I try to select a song I can't because they are all "greyed" out and I can't play the song. Is there anyway around this?