Awhile ago, I moved all of my iTunes music from one computer to another, but I did so without copying the actual iTunes library folder from one to another. Since then, the libraries have diverged. Unfortunately, there are several playlists that I'd like to move from one computer to another. Is there any way built-in to iTunes to do this, provided that the proper songs exist on the target machine? If not, is there a third-party tool that can cross-reference the exported XML playlist with the songs in the iTunes library?