[Nirth]

вообще не так давно писал класс, не тестил толком, было сделанно с расчетом на Flash Player 6 так что там нету MovieClipLoader

но грузит много всякой дряни.

import mx.events.EventDispatcher;
import mx.utils.Delegate;
/**
 * Enter description here
 * 
 * @author  Nirth
 * @version 1.0
 * @since   
 */
 
 //Event dispatches with interval while loading in progress
 [Event("progress")]
 //Event dispatches when data is loaded
 [Event("complete")]
class com.onorange.lib.utils.MultiLoader {
	//initialize event dispatcher
	private static var __initED = EventDispatcher.initialize(MultiLoader.prototype);
	public var dispatchEvent:Function;
	public var addEventListener:Function;
	public var removeEventListener:Function;
	//
	private var __objectsToLoad:Array;
	private var __pathes:Array;
	private var __intervalID:Number;
	private var __interval:Number;
	//
	/**
	 * Constructor, creates instance of MultiLoader 
	 * @usage   				import com.onorange.lib.utils.MultiLoader
	 * 							var loader:MultiLoader = new MultiLoader(50,[_root.mc1,_root.mc1.mc2,_root.mc3],["mc1.swf","mc2.swf","mc3.swf"]);
	 * 							function progress(evt:Object):Void {
									trace(evt.loaded+"/"+evt.total);
								}
								loader.addEventListener("progress",onProgress);
								
	 * @param   interval  		Number, interval in which <code>progress</code> event will be dispatched
	 * @param   loadArray 		Array, of objects, in which you want to load media
	 * @param   path      		Array, of pathes to media
	 * @return  				Nothing
	 */
	public function MultiLoader(interval:Number, loadArray:Array, path:Array) {
		//assign variables values
		__interval = interval;
		__objectsToLoad = loadArray;
		__pathes = path;
		//start loading
		__initLoading(loadArray, path);
		//start interval
		__intervalID = setInterval(Delegate.create(this, __update), __interval);
	}
	
	//private methods
	private function __update():Void {
		var t:Number = 0;
		var l:Number = 0;
		for (var i:Number = 0; i<__objectsToLoad.length; i++) {
			t += __objectsToLoad[i].getBytesTotal();
			l += __objectsToLoad[i].getBytesLoaded();
		}
		var p:Number = Math.round(l/t*100);
		dispatchEvent({type:'progress',loaded:l,total:t,percent:p});
		if (p == 100) {
			dispatchEvent({type:'complete',loaded:l});
			clearInterval(__intervalID);
		}
	}
	private function __initLoading(objects:Array, path:Array):Void {
		for (var i:Number = 0; i<objects.length; i++) {
			var method:String = (objects[i] instanceof MovieClip) ? "loadMovie" : "loadSound";
			objects[i][method](path[i]);
		}
	}
}

о найденых багах писать сюды