Pre loader - does this script work with Flash 2004?

Pre loader - Does it work with Flash Mx 2004 ??

Does this script work with Flash Mx 2004 ?

totalK = getBytesTotal()/1000;
loadedK = getBytesLoaded()/1000;
remainingK = totalK-loadedK;
percentageK = (loadedK/totalK)*100;
setProperty (“bar”, _xscale, percentageK);
if (loadedK>=totalK && totalK != 0) {
gotoAndPlay (3);
}

I´ve just installed and felt l a bit confused ;
Is there a way to paste the above action to
the frames ?

Actions frame panel is nothing but friendly ;
By the way I noticed that circle at every frame 1
what the meaning of that ?