I was never able to figure out a way to have it not add to the library. So, I just changed my thinking a little bit. Instead of using the library to find and manage music, I created a bunch of playlists by artist or album, kind of like on my empeg. Then, I treat the library as the equivalent of the "all tracks" soup view on the empeg; something I only go into when necessary.

Of course, I only have a few hundred MB of music on my mac, and this organization scheme would really break with any more, since iTunes doesn't do nested playlists.

The more time I spend working in this thread, the more I become aware of the limitations of iTunes. So why do I use it? I guess because it's free, it came with the OS, it's pretty, and Apple told me to?