[MrPoma]

Как-то так:

var current:Number = 0; 
var clipLoader:MovieClipLoader = new MovieClipLoader();

onLoadInit = function(mc:MovieClip){
	current ++;
	
	loadImage();
}
clipLoader.addListener(this);

function loadImage():Void{
	var url:String = 'img' + current + '.jpg';
	var container:MovieClip = _root.createEmptyMovieClip('img' + current, _root.getNextHighestDepth());
	clipLoader.loadClip(url, container);
}
loadImage();