I have two Macs with similar but different iTunes libraries (one's my dad's, the other's mine), I was wondering how I can combine the libraries easily. Since i have my dad's music saved on my external HD, just the iTunes library, if I copy an artist from his library say "The Beatles", it will delete everything in my library thats from that particular artist? any help? thanks. by the way, I'm using OSX, for application sake.