I'm cataloguing my music collection onto iTunes at the moment and thought of an idea for an iTunes update that would be useful to me. Basically, it's aliases for songs. For instance, let's say I have all the non-collection/compilation albums from Artist A imported into iTunes. But then I buy say the Greatest Hits of Artist A because of a bonus track or whatever. To save space I don't import the songs I already have. But then the Greatest Hits album is technically incomplete, although I already have the songs contained on it. So if I wanted to burn a CD of the Greatest Hits for whatever reason, I have to know the track listing and drag and drop tracks from the other albums. A bit awkward. I could import all the tracks from Greatest Hits but this is a bit wasteful of disk space given the fact I already have most of them. But what if you could alias all the tracks contained on the Greatest Hits that you already have so they appear in the list as tracks from "Greatest Hits" but actually link to the file that came off the release album. And the alias'd songs would naturally go hand in hand with the bonus track or whatever that I'd actually imported. It'd save space and make burning CDs and what not much easier. What do you guys think?