On the plus side, it's very easy to find where all your music is. Locate the playlist file that has all the tunes you want to move and open it up in Notepad. Inside the playlist file you'll see all the directory information for each tune.
The playlist file has an extension of ".m3u". An easy way to see where your default directory for the files is to go File -> Save Playlist As.
You can always do a search to see where they are stored using "*.m3u" as the search query.
-pat