Stopping all script Actionscript calculations

1

I have a flash file with actionscipt easing on movement, scale and alpha on several MC’s my problem is they cause the CPU usage in the task manager to be at a constant 100% when the movie is running, I know the problem is that its constantly calculating the easing. Any suggestions?

http://www.geocities.com/invisible5uk/bigart.fla

Below is my current easing script for both alpha and scale.

onClipEvent (enterFrame){
_alpha = _alpha+(100-_alpha).09
_yscale = _yscale+(100-_yscale).09
_xscale = _xscale+(100-_xscale)*.09
stop();

}