The AirPuck Music file is simply a QuickTime Movie without any video. Therefore, you can use the sound track from any QuickTime Movie you like and turn it into an AirPuck Music file (if you try using a QuickTime Movie with a sound track and a video track as the AirPuck Music file, it will work, but you'll also see the video in the top-left corner of the window). Here's how:
-Find a QuickTime Movie file you want to use the sound track from for AirPuck
-Open it using Movie Player 2.1 or later (Downloadable from wherever you got AirPuck, most
likly)
-Go to the Edit menu, and select "Extract Track..."
-A dialog box will apear with a list of tracks; select the one that contains the sound you want
in AirPuck and press the "Extract" button
-A new movie file named "Untitled 1" and without any video portion will apear on your screen
-Choose "Save As..." from the File menu. Give the peice a suitable name
-When you want to use this sound track in AirPuck, simply move it into the "AirPuck Data" folder, and rename it "AirPuck Music". Note: you may need to move or rename your old "AirPuck Music" file before you can do this step.