^^^^ Yea I did that for 30mins unlock most the music stuff......
here some youtube vids of other people's version of the cd factory. I made a replica of the last link but for 2 players instead of 4 it worked pretty well with 2 foxes rapid kicking.
http://www.youtube.com/watch?v=qN5qnUpWA_Q
http://www.youtube.com/watch?v=zg28YmYM3Gc&feature=related
http://www.youtube.com/watch?v=JHlDWN1B198&feature=related