Help with the Tween Class

Hey All,
Im in some need of help here, Im just starting to learn the tween class and am having an issue. Im trying to do a bunch of photos stacked on top of each other so you can move them apart. Im having issues with the math. On the release i want it to have the effect of sliding a bit with an ease out in the same direction that it was pulled in.

Thanks in advance.

import mx.transitions.Tween;
import mx.transitions.easing.*;

large1.onPress = function() {
this.startDrag(false, 328.8, 253.9, 1039.5, 609.2);

var endx:Number = (_x + 10);
var endy:Number = (this._y);

large1.onRelease = large1.onReleaseOutside = function() {
var t = new Tween(this, “_x”, Regular.easeOut, this._x, endx, 2, false);
var t1 = new Tween(this, “_y”, Regular.easeOut, this._y, endy, 2, false);