mp3 Progress Bar

I have a simple .fla that loads an mp3 dynamically using this script:

on (release) {
mySound.loadSound(“http://www.antoniomusic.com/audio/MusicIsBorn.mp3”,true);
}

I need to create a progress bar preloader to play while the mp3 is being located and served. The tuts I’ve been finding have so many other features that at my current level I can’t sort through the AS to get what I need. Does anyone know of a simple progress bar preloading script I can use on these mp3’s?

TIA
Amelia