forgive me if this is a stupid question, but i'm somewhat new to it. i've recently purchased an ipod and i own both a pc and ibook g4. all my music is on my pc so that's what i've been using to sync my music up. i do, however, have a few songs on my ibook. i plugged my ipod into my ibook expecting itunes to copy all the music from my ipod to my ibook and add them to the library but that didn't seem to be the case. it asked me if i wanted to erase the songs on there and create a new library with the songs on my ibook. i selected no but couldn't add the songs. i selected yes and all my songs from my pc were erased. this isn't exactly a good setup. i can't believe apple would do something this stupid, so i'm thinking it's just me not knowing exactly how to make it work. anybody know how i can share songs between computers?