AS2 Disjointed Rollovers

Hi

Can anyone help me with a simple disjointed rollover using (preferably) AS2 with Flash CS4 Windows.

I have a series of button symbols on the left of the stage and a single default image (movie clip) to the right. I want the default image to change when the mouse passes over the buttons. Effectively a swap/restore action.

Any help, tips, tutorials much appreciated.

Thanks

George