More efficient way of loading multiple images?

This is how I'm loading my external images atm. The only problem is that I need to load all of them before they get placed on the stage. Even though my images take only 10-15kb, there's a considerable downtime at just 15 images. Would it be possible to place all instances of movieclip 'imgContainer' first, and then add images to them, or start placing imgContainer one by one as soos as consecutive images are getting loaded? I'd be grateful for any help.

public function Parseimage(imageinput: XML): void {
			
			imageurl = imageinput.image.iurl;
			listId = imageinput.image.id;
			captions = imageinput.image.captions;
			images_num = imageurl.length();
			
			loadContent();
		}

		
		function loadContent():void{
  
			var picRequest: URLRequest = new URLRequest(imageurl[n]);
			var picLoader2 = new Loader();
			picLoader2.load(picRequest);
			picLoader2.contentLoaderInfo.addEventListener(Event.COMPLETE, picLoaded);
			picLoader2.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, erLoaded);
}
		
			function erLoaded(event: IOErrorEvent): void {

			trace("error");
		}		

		public function picLoaded(e: Event): void {

			loadedPics.push(e.target.content);
			var images_num_str:String = images_num.toString();
			var zet:int = n+1;
			var n_str:String = zet.toString();
			loadingMenu.mytxt.text = "Loaded " + n_str + " / " + images_num_str;
			
			if(n == images_num - 1){
				
				for(var i:uint = 0; i < images_num; i++){
					
			menuElement = new MenuBTN;
			menuHolder.mouseChildren = true;
			menuElement.idn = listId[i];
			menuElement.link = "myfile.swf";
			menuElement.tag = i;
			menuElement.title.text = captions[i].toString();
			menuElement.buttonMode = true;
			menuElement.useHandCursor = true;
			menuElement.mouseChildren = false;
			menuElement.addEventListener(MouseEvent.CLICK, onClick);
			menuElement.addEventListener(MouseEvent.MOUSE_UP, onMouseMove);
			menuElement.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDownHandler);
			
					
				menuElement.x = 130 + (i * 460 - xVal);
				repNum++;
		
				if(menuElement.x > 1550){
			yVal += 550;
			menuElement.x = 130;
			xVal = i * 460;
					
			
       } 	
	
	
				
			var myTween: Tween = new Tween(menuElement, "y", Bounce.easeOut, 700, yVal, 2.5, true);
			
			trace(menuElement.x);
			menuHolder.addChild(menuElement);
			menuElement.imgContainer.addChild(loadedPics[i]);
			loadingMenu.mytxt.text = "Loading"
			loadingMenu.visible = false;

   }
				
			}
			
			 else{
       n++;
       loadContent();
  }