If possible, since I'm bored with bored the GBC's I have, I'd like to make it into an Mp3 player. If possible, I want to use the buttons from the GBC to play, pause, etc, the mp3 player, but of course, still have it working, and I would like to do it so that I can switch between the mp3 and the GBC when it comes to hearing it. Any thoughts, suggestions, advice?