How to center loaded swf

programming flash
1

Hi

I have this script for loading/zooming in and unloading/zooming out swfs.
Currently the zooming in/out is related to a top left registration point, but
I would like to have the zooming starting from center.
I know that theoretically it is possible to do this, working with an outer and an inner container, centering the inner in the outer, but I couldnt make things really work.

Can somebody give me a little help?

Thanks

//import classes
import mx.transitions.*;
import mx.transitions.easing.*;

loadbar._visible = false;
swfArray = new Array("page 1.swf", "page2.swf", "page3.swf", "page 4.swf" );

var prevCon:MovieClip = this.createEmptyMovieClip("empty", this.getNextHighestDepth());

//mcs to zoom out;
prevCon._x = 270;
prevCon._y = 0;
prevCon.setMask(MASKE);
var n:Number;
//memorize last pressed

function zoomTrans(myPrevClip:MovieClip, myClip:MovieClip) {
	
	zoomOutX = new Tween(myPrevClip, "_xscale", None.easeNone, 100, 0, 1, true);
	zoomOutY = new Tween(myPrevClip, "_yscale", None.easeNone, 100, 0, 1, true);
	
	zoomOutY.onMotionFinished = function() {
		myPrevClip._alpha = 0;
		myClip._alpha = 100;
		
		zoomInX = new Tween(myClip, "_xscale", None.easeNone, 0, 100, .7, true);
	    zoomInY = new Tween(myClip, "_yscale", None.easeNone, 0, 100, .7, true);
		
		removeMovieClip(myPrevClip);
		
		zoomInY.onMotionFinished = function() {
			
			for (j=1; j<=7; j++) {
				_root["btn"+j].enabled = true;
			}
			//enable buttons
			_root["btn"+n].enabled = false;
			//but not last pressed
		};
	};
}


for (var i = 1; i<=7; i++) {
	this["btn"+i].ID = i;

	this["btn"+i].onRollOver = function() {
		this.gotoAndPlay("OVER");
	};


	this["btn"+i].onRollOut = this["btn"+i].onReleaseOutside=function () {;
	this.gotoAndStop("UP");
};

this["btn"+i].onRelease = function() {
	//trace(this);
	n = this.ID;
	for (j=1; j<=7; j++) {
		this._parent["btn"+j].enabled = false;
		this._parent["btn"+j].gotoAndStop("UP");
	}
	//disable buttons
	var con:MovieClip = this._parent.createEmptyMovieClip("con"+this.ID, this._parent.getNextHighestDepth());

con._x = 270 ;
con._y = 0 ;
	con.setMask(MASKE);
	con._alpha = 0;
	
	con.loadMovie(swfArray[this.ID-1]);
	loadbar._visible = true;
	this.onEnterFrame = function() {
		var percent:Number = int(Math.round(con.getBytesLoaded()/con.getBytesTotal()*100));
		loadbar._xscale = percent;
		if (percent>=100) {
			//after swf is loaded, do the Tween
			loadbar._visible = false;
			//trace("prev= "+prevCon);
			//trace("con= "+con);
			this.gotoAndPlay("HIT");
			zoomTrans(prevCon,con);
			prevCon = con;
			con.setMask(MASKE);
			delete this.onEnterFrame;
		 }
		//end if   
	  };
	//end onEnterFrame
   };
//end onRelease
}
//end for
stop();
btn1.onRelease ();