Overlapping buttons

[plasmosys]

Hi guys
This seems like such an easy thing to do but it's driving me crazy. Sorry if this is a simple question.

In a site I am building it is necessary to have a large movieclip overlaid over an image gallery. This movieclip controls scrolling so has a rollover listener attached, but of course the gallery pictures also need to have button actions.
I cannot get them both working at the same time.

How can I make it so that rolling over a movieclip doesn't disable the rollover for any movieclips underneath it?

Here is a very simple example of the problem. Where the two buttons intersect, I want for the rollover to trigger them both:
http://dl.dropbox.com/u/6591588/Buttons.fla

Does anyone know the solution?
Thanks

[cancerinform]

You cannot use the buttons underneath unless you inactivate the top button.