Xml photo gallery

hello!!

i m trying to create a photo gallery that load external pics using xml.

>>> so my xml file is this:

<gallery>
<image title=“title1 here” main=“images/pic1.jpg” thmb=“thumbnails/pic1thumb.jpg” />
<image title=“title2 here” main=“images/pic2.jpg” thmb=“thumbnails/pic2thumb.jpg” />
</gallery>

>>> my actionscript is this:

myPhoto = new XML();
myPhoto.ignoreWhite = true;
myPhoto.onLoad = function(success) {
//portfolioTag = this.firstChild;
numimages = this.firstChild.childNodes.length;
spacing = 50;
for (i=0; i<numimages; i++) {
this.picHolder = this.firstChild.childNodes*;
this.thumbHolder = thumbnails.createEmptyMovieClip(“thumbnail”+i, i);
this.thumbHolder._y = i*spacing;
this.thumbLoader = this.thumbHolder.createEmptyMovieClip(“thumbnail_image”, 0);
this.thumbLoader.loadMovie(this.picHolder.attributes.thmb);
this.thumbHolder.title = this.picHolder.attributes.title;
this.thumbHolder.main = this.picHolder.attributes.main;
this.thumbHolder.onRelease = function() {
loader.loadMovie(this.main);
title_txt.text = this.title;
};
}
};
myPhoto.load(“xmlphoto.xml”);

and it s working fine! BUT:
my goal is that when u rollover the thumbnail another thumbnail loads in the same place!!! can i do that and how!?!!

thanks for your help