I have a rather large music collection organized like music/<artist>/<album>/<track>-<title>.<fmt>, mostly mp3. However, the tagging is rather inconsistent, as on the PC or with better old players (Cowon D2+) I don't care and use the filesystem view.

However, in the iTunes this all gets messed up because it doesn't care about file locations and looks at tags. What's worse though, it consistently splits compilations into single-track artist-albums.

So, is there a way to take the existing filesystem artist-album structure and bring it to the form compatible with iTunes/iPod? Again, I don't care about tags.

Automated approach is most welcome, but at least please direct me to some document specifying all the little details about iTunes' metadata requirement for compilations.