Mc registration point I think

Hi all I have made an xml gallery using the examples on this site but I want my images to resize from the left intstead of the centre. I have tried changing the reg point of the movieclip but cant seem to get it to work. Do I need to cahnge something in my code? I have posted it below. Thanks

 var tnNr; 
spacing = 10;
container._alpha = 0;
var curLength;
var cur, slideInterval;
var slide=0;
MovieClip.prototype.loadPic = function(nr) { 
 
clearInterval(slideInterval); 
 
		preloader._visible = 1; 
		info.text = ""; 
 
		this._alpha = 0; 
 
		this.loadMovie(pArray[nr]); 
cur = nr; 
 
		temp = this._parent.createEmptyMovieClip("temp2", 998); 
 
		temp.onEnterFrame = function() { 
 
				var t = container.getBytesTotal(), l = container.getBytesLoaded(); 
				var per = Math.round((l/t)*100); 
 
				preloader.bar._xscale = per; 
 
				preloader.loadInfo.text = per+" % loaded"; 
 
	//
 
				if (Math.round(l/t) == 1 && container._width != 0 && container._height != 0) {
						preloader._visible = 0; 
 
 
 
						var w = container._width+spacing, h = container._height+spacing;
 
 
 
						border.resizeMe(w, h, nr); 
						delete this.onEnterFrame; 
				}
		};
};
 
MovieClip.prototype.resizeMe = function(w, h, nr) { 
 
var speed = 3; 
container._alpha = 0; 
 
this.onEnterFrame = function() { 
 
 
 
this._width += (w-this._width)/speed; 
 
this._height += (h-this._height)/speed; 
 
 
 
if (Math.abs(this._width-w)<1 && Math.abs(this._height-h)<1) { 
 
this._width = w; 
this._height = h; 
 
container._x = this._x-this._width/2+spacing/2; 
container._y = this._y-this._height/2+spacing/2; 
info._y = Math.round(this._y+this._height/2+spacing/2); 
container._alpha += 5; 
 
if (container._alpha>90) { 
 
	info.text = iArray[nr];
 
	container._alpha = 100;
 
 
 
if (slide) {
	 slideInterval = setInterval(slideshow, 4000);
	}
	delete this.onEnterFrame;
}
}
};
}; 
function galleryChoice(q) {
pArray = new Array();
tArray = new Array();
iArray = new Array();
my_xml = new XML(); 
 
for (var j = 0; j<curLength; j++) {
 
this.th_nav["thmb"+j].removeMovieClip(); 
}
 
my_xml.ignoreWhite = true; 
 
my_xml.onLoad = function(loaded) {
if (loaded) { 
 
gallery = this.firstChild.childNodes[q]; 
curLength = gallery.childNodes.length; 
 
for (var i = 0; i<gallery.childNodes.length; i++) { 
 
	pArray.push(gallery.childNodes*.attributes.source);
	tArray.push(gallery.childNodes*.attributes.thumb);
	iArray.push(gallery.childNodes*.attributes.title); 
}
}
delay = setInterval(makeButtons, 50); 
};
my_xml.load("gallery.xml");
}
function makeButtons() {
tnNr = 0; 
 
 
clearInterval(delay);
for (var i = 0; i<tArray.length; i++) { 
 
var thb = th_nav.thmb.duplicateMovieClip("thmb"+i, 1000+i);
thb.id = i;
thb._x = i%25*30; 
thb._y = Math.floor(i/25)*30;
}
loadButtons(); 
}
function loadButtons() {
var tbox = th_nav["thmb"+tnNr].box; 
tbox.loadMovie(tArray[tnNr]); 
 
temp = this.createEmptyMovieClip("tmp"+tnNr, 999);
temp.onEnterFrame = function() {
 
bt = tbox.getBytesTotal(); 
bl = tbox.getBytesLoaded();
if (bt == bl && bt>4) {
nextButton();
delete this.onEnterFrame;
}
};
}
 
function nextButton() {
if (tnNr<tArray.length-1) {
tnNr++;
loadButtons();
} else {
activateButtons();
}
}
function activateButtons() {
mainButtons();
for (var i = 0; i<pArray.length; i++) {
var but = th_nav["thmb"+i];
but.id = i;
but.onRelease = function() {
container.loadPic(this.id);
disButtons2(this.id);
};
}
container.loadPic(0);
disButtons2(0);
} 
 
butArray = new Array();
butArray = ["gal1_btn", "gal2_btn", "gal3_btn", "gal4_btn"];
function mainButtons() {
for (var i = 0; i<butArray.length; i++) {
this[butArray*].id = i;
this[butArray*].onRelease = function() {
galleryChoice(this.id);
disButtons(this.id);
};
}
}
function disButtons2(d) {
for (var i = 0; i<tArray.length; i++) {
if (i != d) {
this.th_nav["thmb"+i].enabled = 1;
this.th_nav["thmb"+i].box._alpha = 100;
} else {
this.th_nav["thmb"+i].enabled = 0;
this.th_nav["thmb"+i].box._alpha = 50;
}
}
}
function disButtons(d) {
for (var i = 0; i<butArray.length; i++) {
if (i != d) {
this[butArray*].enabled = 1;
this[butArray*].gotoAndStop(1);
} else {
this[butArray*].enabled = 0;
this[butArray*].gotoAndStop(2);
}
}
}
function slideshow() {
if (cur == pArray.length-1) {
container.loadPic(0);
} else {
container.loadPic(cur+1);
}
}
play_slide.onRelease = function() {
		slide = 1;
		slideInterval = setInterval(slideshow, 4000);
		this.gotoAndStop(2);
		stop_slide.gotoAndStop(1);
 
};
stop_slide.onRelease = function() {
		slide = 0;
		clearInterval(slideInterval);
		this.gotoAndStop(2);
		play_slide.gotoAndStop(1);
};
disButtons(0);
galleryChoice(0);