Help xml picture proportions problem

programming flash
1

I am creating a slideshow for a client, he would like to have it so that he can replace the pictures in the slideshow without any coding. I have gotten the xml part working but am having problems if you put big pictures into the slideshow. I do have some code already for changing the size of the movieclip that it puts the loaded picture into but the larger pictures are still large. Here is the code that i have so far.

var xml:XML;
var xmlList:XMLList;
var xmlLoader:URLLoader = new URLLoader();
var imgArray:Array = new Array();
var imageLoader1:Loader;
var currentPic:MovieClip;
var j:Number = 0;
var p:Number = 0;

xmlLoader.load(new URLRequest(“images.xml”));
xmlLoader.addEventListener(Event.COMPLETE, xmlComplete);

function xmlComplete(event:Event) :void {
xml = XML(event.target.data);
xmlList = xml.children()
imageLoader1 = new Loader();
imageLoader1.load(new URLRequest(xmlList[0].attribute(“href”)));

	imgholder1_mc.addChild(imageLoader1);
	imgArray.push(imgholder1_mc);
	imageLoader1.x = -100;
	imageLoader1.y = -100;

}

my main problem is that you are not allowed to change the dimensions of a “visible” loader. Any help would be appreciated