Просто доработать....

Код:
import mx.transitions.*;
import mx.transitions.easing.*;
var v = 10, id = 0;
mc.onMouseDown = function() {
var x = this._parent._xmouse, y = this._parent._ymouse;
moving = new Tween(this, "_x", None.easeOut, this._x, x, 20);
moving = new Tween(this, "_y", None.easeOut, this._y, y, 20);
};