itunes is gay
when you plug the ipod in the pc don't sync it you will lose any new apps that have dowloaded, instead go to transfer purchases and that will put all his new apps over to the computer, as for the music, it has to be stored locally to the computer your syncing it to, so if they are 100's of mp3's they need to be on your computer for the sync to work for music.
crap i know