Easy solution? Burn it to a CD and re-import it to iTunes, giving you a MP3 file. I don't think you can play Fairplay-protected files using anything other than iTunes, but you could of course use AppleScript from the AIR client to make iTunes play the file. But that's probably more trouble than it's worth.
Y!Hack may not be the best forum for finding answers to tech issues. You might try ask.metafilter.com, some smart folks over there and they dig those types of questions.