Sticky/smart buttons problem

I’m missing something really simple here.

I’m tired of having noob buttons and want to use something more intelligent, I believe it’s called sticky button, or smart buttons i.e., the menu “knows” which section you’re in, and disables that button and changes it’s color, making it apparent where you’re at.

So I found a tutorial, but I’m stuck. Check out my source FLA, I’m just trying to load another .swf into a container, or empty movie clip.

http://www.efcmusic.com/rob/sticky.zip

This is on the button frame:

onClipEvent(load)
{
	page = 2;
}

This is on a frame within the button:

on (rollOver)
{
    if (_root.link != page) 
    {
        this.gotoAndPlay("over");
    }
}
on (releaseOutside, rollOut)
{
    if (_root.link != page) 
    {
        this.gotoAndPlay("out");
    }
}
on (release)
{
	_root["btn" + _root.link].gotoAndPlay("out");
	_root.link = page;
}

So where can I put my loadMovie stuff? :

btn1.onPress = function() {
	sections.loadMovie("testclip.swf");
}