ActionScript 2.0 :: Using Scroll Effect For Thumbnails In Flash Portfolio

I really want to use this panning/scrolling effect for some thumbnails in a flash portfolio. My only problem is it's AS3 and I'm using Flash 8 (AS2). I've tried re-working the code, but with no luck. It's the EventListener that is confusing me!

Code:
var verticalCenter:Number = stage.stageHeight / 2;
var limit:Number = stage.stageHeight - content_mc.height;
var speed:Number = 0.1;
var scrollY:Number = 0;
addEventListener(Event.ENTER_FRAME, scrollContent);
function scrollContent(e:Event):void {
scrollY = - speed * ( mouseY - verticalCenter );
content_mc.y+= scrollY;
if (content_mc.y>0) { content_mc.y= 0;}
else if (content_mc.y< limit) { content_mc.y= limit; }}