Need help replacing tween class movement with easing!

1

i’m trying to smooth out the movement on this piece of code. it plays especially bad on the mac platform.

can anyone help me change the tween class over to basic easing?

code:

menuClip.onEnterFrame=function(){
	 if (this.hitTest(_root._xmouse, _root._ymouse) && _root._xmouse < this._x+578 && _root._xmouse > this._x) {
		 
		 trace("menu pos: "+this.holder._x);
		
		 if (_root._xmouse < centerPoint-100 && holder._x<0){  
			 trace("above center");
			 //change speed
			 if(_root._xmouse > (centerPoint-100)-50){
			 						var t1:Tween = new Tween(holder, "_x", Strong.easeOut, holder._x, holder._x+3, 1, false);
									
								 };
			 if(_root._xmouse < (centerPoint-100)-50){
									var t1:Tween = new Tween(holder, "_x", Strong.easeOut, holder._x, holder._x+6, 1, false);
									
								 };
		 };
		 
		 if (_root._xmouse > centerPoint+100 && holder._x>botBounds){ 
			 trace("below center");
			 if(_root._xmouse < (centerPoint+100)+50){
			 					var t1:Tween = new Tween(holder, "_x", Strong.easeOut, holder._x, holder._x-3, 1, false);
								//move over slower
			 };
			 if(_root._xmouse > (centerPoint+100)+50){
				 				var t1:Tween = new Tween(holder, "_x", Strong.easeOut, holder._x, holder._x-6, 1, false);
								//move over faster
			 }
				 

		 }
			 
		
	 }
	
}