I just bought a MacBook Pro. I have my iTunes library on an external firewire HDD. I want to keep it there, but have iTunes on my new Mac access it. However, even though I have put the path to that drive in iTunes Preferences, the songs there don't show up in iTunes. The new Mac is authorised, and I have bought a song on the iTunes store, which was saved to the external drive. So what do I need to do? Do I get one of the library files copied over from the old machine (also a Mac)? Thanks.