HELP! Need code to download mp3 files to user's desktop.

Hey Guys, I'm a webMaster (in training) by day and a Music Producer by night and I need a little help if somebody can be so kind. I'm building a demo page to send to radio stations across the country of my music, I pretty much have it all done except the DOWNLOAD Button, I can't seem to find the script for that anywhere. Can some one help me out please?

Thanks,

DJ Juanito

http://www.zombeat.com
http://www.zombeat.com/juanitos_demos.htm