Правильная последовательность загрузки

[Akopalipsis]

package
{
	import flash.display.Bitmap;
	import flash.display.DisplayObject;
	import flash.display.Loader;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.IEventDispatcher;
	import flash.events.IOErrorEvent;
	import flash.events.MouseEvent;
	import flash.net.URLRequest;
 
	public class Main extends Sprite
	{
		private var _paths:Vector.<URLRequest>;
		private var _images:Vector.<Bitmap>;
		private var _loader:Loader;
		private var _id:uint;
		public function Main() 
		{
			if (stage) init();
			else addEventListener(Event.ADDED_TO_STAGE, init);
		}
 
		private function init(e:Event = null):void 
		{
			removeEventListener(Event.ADDED_TO_STAGE, init);
 
			var xml:Array = ['button-in.png', 'button-out.png'];
 
			_id = 0;
 
			_paths = new Vector.<URLRequest>([]);
 
			var length:int = xml.length;
			for (var i:int = 0; i < length; i++) 
			{
				_paths.push(new URLRequest(xml[i]));
			}
 
			_images = new Vector.<Bitmap>([]);
 
			_loader = new Loader();
			this.addListener(_loader.contentLoaderInfo);
			this.addLoaded(_paths[0]);
		}
		private function addLoaded(url:URLRequest):void
		{
			try 
			{
				_loader.load(url);
			}
			catch (error:Error)
			{
				trace(error.message);
			}
		}
		private function addListener(dispatcher:IEventDispatcher):void
		{
			dispatcher.addEventListener(Event.COMPLETE, dispatcher_completeHandler);
			dispatcher.addEventListener(IOErrorEvent.IO_ERROR, dispatcher_ioErrorHandler);
			trace("###Слушатели - добавлены");
		}
		private function removeListener(dispatcher:IEventDispatcher):void
		{
			dispatcher.removeEventListener(Event.COMPLETE, dispatcher_completeHandler);
			dispatcher.removeEventListener(IOErrorEvent.IO_ERROR, dispatcher_ioErrorHandler);
			_loader = null;
			trace("###Слушатели - удалены");
		}
		private function dispatcher_ioErrorHandler(event:IOErrorEvent):void 
		{
			trace(event.errorID);
		}
 
		private function dispatcher_completeHandler(event:Event):void 
		{
			var bitmap:Bitmap = event.target.content as Bitmap;
			_images[_id] = bitmap;
			_id++;
			_paths.shift();
			if (_paths.length) this.addLoaded(_paths[0]);
			else this.removeListener(_loader.contentLoaderInfo);
		}
	}
 
}