Currently, all my music files are stored on my desktop PC. I'm trying to keep my Macbook's HDD free by not having duplicates of music files I already have. I understand that if I turn on the sharing feature of both iTunes, I can listen to both libraries. What I want to do is have the ability to actually rate songs and or change the ID3 tags to the desktop's library <b>from</b> the Macbook. How will I be able to do this? Thanks if you could help.