Load .mp3 dynamically with Flash MX

I can load an .mp3 dynamically (streaming) but I would please please like to know how I could some some sort of a preloader which shows how much sound has been loaded so far.

I think it has something to do with knowing the "getBytesLoaded() and getBytesTotal() of the sound that is loaded.

An example is here: http://www.gmg.com.au/assets/tutorials/flash-mx-audio/index.html

The commentry/audio is playing in the background and there is an animation which shows how much sound has loaded.

If you could point me in the right direction, I could try it myself.

I know you have to create a movie clip and set movieclip.width = totalbytes loaded etc something like that…

Please help me out…