Loading External Movies with Preloader

Hello All.
I’m made a simple preloader that works fine for my main movie. Now I need it to work when loading external movies.

Can anyone help?? Below is the code I’m using (AS 2.0) for the preloader.

onClipEvent (enterFrame) {
loading = _parent.getBytesLoaded();
total = _parent.getBytesTotal();
percent -= (percent-((loading/total)100)).25;
per = int(percent);
percentage = per+"%";
loadBar._width = per;
if (percent>99) {
_parent.gotoAndPlay(2);
}
}

Thanks.

mr.Damon