VERY simple XML / MP3 question

Hello. Not sure if this is the right section to put this in but here goes…

I am looking for a way to load a small (10 second or so) mp3 file using xml to loop as background music for a flash slideshow I am making. All it needs is 1 play/stop button and the mp3 needs to loop continuously.

The people I am doing this for want to be able to change the mp3 without using the fla file which is why I am trying to use xml for this. (something I am not very experienced with. I have played around at the numerous xml/mp3 players out there but I really don’t need track titles, load bars, all of that stuff. I really just need the mp3 to loop in the background and a small button to stop the sound if needed.

If anyone can help it would be greatly appreciated!