Help with exsisting code for scrolling flash 8 menu

First thank you to all who read and help.

Here is a sample of what the page looks like so far:

here is my code so far:

onClipEvent (load)
onClipEvent (enterFrame)
var distance=_root._xmouse-xcenter;
if (_x > 0) _x=-440;
if (_x < -440) _x=0;

My question is, those pictures are actual buttons that I would like to make larger when the user scrolls over them.

Meghan Lundy