problema galeria

[el_enano_rumbero]

haber tengo esta galeria que he ido modificando a mi antojo, para acercarme a lo que queria, pero hay una cosa que se sale de mi nivel. cuando tengo ampliada una foto no puedo seleccionar otra, sin antes clikear sobre la que tengo para que se cierre y hacerlo de nuevo sobre una nueva para que se amplie. lo que quiero es quitar esos 2 pasos y dejarlo simplemente en clikear sobre una nueva y que aparezca en grande. eso, sin perder lo que tengo, que desaparezca la foto grande cuando pulse sobre ella. muchas gracias de antemano

[el_enano_rumbero]

import fl.controls.ProgressBar;
import fl.transitions.Tween;
import fl.transitions.easing.*;
import fl.transitions.TweenEvent;

var columns:Number;
var my_x:Number;
var my_y:Number;
var my_thumb_width:Number;
var my_thumb_height:Number;
var my_images:XMLList;
var my_total:Number;

var container_mc:MovieClip;
var preloaders_mc:MovieClip;
var full_mc:MovieClip;

var x_counter:Number = 0;
var y_counter:Number = 0;

var my_tweens:Array = [];
var container_mc_tween:Tween;
var full_tween:Tween;

var myXMLLoader:URLLoader = new URLLoader();
myXMLLoader.load(new URLRequest("gallery.xml"));
myXMLLoader.addEventListener(Event.COMPLETE, processXML);

function processXML(e:Event):void {
var myXML:XML = new XML(e.target.data);

columns = myXML.@COLUMNS;
my_x = myXML.@XPOSITION;
my_y = myXML.@YPOSITION;
my_thumb_width = myXML.@WIDTH;
my_thumb_height = myXML.@HEIGHT;
my_images = myXML.IMAGE;
my_total = my_images.length();

createContainer();
callThumbs();

myXMLLoader.removeEventListener(Event.COMPLETE, processXML);
myXMLLoader = null;
}

function createContainer():void {
container_mc = new MovieClip();
container_mc.x = my_x;
container_mc.y = my_y;
addChild(container_mc);

container_mc.addEventListener(MouseEvent.CLICK, callFull);
container_mc.addEventListener(MouseEvent.MOUSE_OVE R, onOver);
container_mc.addEventListener(MouseEvent.MOUSE_OUT , onOut);
container_mc.buttonMode = true;

preloaders_mc = new MovieClip();
preloaders_mc.x = container_mc.x;
preloaders_mc.y = container_mc.y;
addChild(preloaders_mc);
}

function callThumbs():void {
for (var i:Number = 0; i < my_total; i++) {

var thumb_url = my_images[i].@THUMB;

var thumb_loader = new Loader();
thumb_loader.load(new URLRequest(thumb_url));
thumb_loader.contentLoaderInfo.addEventListener(Ev ent.COMPLETE, thumbLoaded);

thumb_loader.name = i;

thumb_loader.x = (my_thumb_width+10)*x_counter;
thumb_loader.y = (my_thumb_height+10)*y_counter;

if (x_counter+1 < columns) {
x_counter++;
} else {
x_counter = 0;
y_counter++;
}
var preloader_pb:ProgressBar = new ProgressBar();
preloader_pb.source = thumb_loader.contentLoaderInfo;
preloader_pb.x = thumb_loader.x;
preloader_pb.y = thumb_loader.y;
preloader_pb.width = my_thumb_width;
preloader_pb.height = my_thumb_height;
preloaders_mc.addChild(preloader_pb);

preloader_pb.addEventListener(Event.COMPLETE, donePb);
}
}

function thumbLoaded(e:Event):void {
var my_thumb:Loader = Loader(e.target.loader);
container_mc.addChild(my_thumb);
my_tweens[Number(my_thumb.name)]=new Tween(my_thumb, "alpha", Strong.easeIn, 0,1,0.5, true);

my_thumb.contentLoaderInfo.removeEventListener(Eve nt.COMPLETE, thumbLoaded);
}

function callFull(e:MouseEvent):void {
var full_loader:Loader = new Loader();
var full_url = my_images[e.target.name].@FULL;
full_loader.load(new URLRequest(full_url));
full_loader.contentLoaderInfo.addEventListener(Eve nt.INIT, fullLoaded);

var full_pb:ProgressBar = new ProgressBar();
full_pb.source = full_loader.contentLoaderInfo;
full_pb.x = (stage.stageWidth - full_pb.width)/2;
full_pb.y = (stage.stageHeight - full_pb.height)/2;
preloaders_mc.addChild(full_pb);

full_pb.addEventListener(Event.COMPLETE, donePb);

container_mc.removeEventListener(MouseEvent.CLICK, callFull);
container_mc.buttonMode = false;
container_mc.removeEventListener(MouseEvent.MOUSE_ OVER, onOver);
container_mc.removeEventListener(MouseEvent.MOUSE_ OUT, onOver);
container_mc_tween = new Tween(container_mc, "alpha", Strong.easeIn, 1,0.5,0.5, true);
}
function fullLoaded(e:Event):void {
full_mc = new MovieClip();
full_mc.buttonMode = true;
addChild(full_mc);
var my_loader:Loader = Loader(e.target.loader);
full_mc.addChild(my_loader);
full_tween = new Tween(my_loader, "alpha", Strong.easeIn, 0,1,0.5, true);
my_loader.x = (stage.stageWidth - my_loader.width)/2;
my_loader.y = (stage.stageHeight - my_loader.height)/2;
my_loader.addEventListener(MouseEvent.CLICK,remove Full);
my_loader.contentLoaderInfo.removeEventListener(Ev ent.COMPLETE, fullLoaded);
}
function removeFull(e:MouseEvent): void {
var my_loader:Loader = Loader (e.currentTarget);
full_tween = new Tween(my_loader, "alpha", Strong.easeOut, 1,0,0.5, true);
full_tween.addEventListener(TweenEvent.MOTION_FINI SH, tweenFinished);

container_mc_tween = new Tween(container_mc, "alpha", Strong.easeOut, 0.5,1,0.5, true);
}

function donePb(e:Event):void {
var my_pb:ProgressBar = ProgressBar(e.target);
preloaders_mc.removeChild(my_pb);
my_pb.removeEventListener(Event.COMPLETE, donePb);
}

function tweenFinished(e:TweenEvent):void {
var my_loader:Loader = Loader (e.target.obj);
my_loader.unload();
full_mc.removeChild(my_loader);// This line was removeChid(my_loader), just add full_mc before it.
removeChild(full_mc);
full_mc = null;

container_mc.addEventListener(MouseEvent.CLICK, callFull);
container_mc.buttonMode = true;
container_mc.addEventListener(MouseEvent.MOUSE_OVE R, onOver);
container_mc.addEventListener(MouseEvent.MOUSE_OUT , onOut);

var my_tween:Tween = Tween(e.target);
my_tween.removeEventListener(TweenEvent.MOTION_FIN ISH, tweenFinished);
}
function onOver(e:MouseEvent):void {
var my_thumb:Loader = Loader(e.target);
my_thumb.alpha = 0.5;
}
function onOut(e:MouseEvent):void {
var my_thumb:Loader = Loader (e.target);
my_thumb.alpha = 1;
}