Animated Flash Menu.. Button over state stays if clicked?

Hi, I made a Flash menu with this tutorial:

The animation is different but the scripting is basically the same.

I have animated buttons (They’re actually movie clips though) that play one animation on rollover, and a different animation on rollout.

What I want to do, is have the button stay on the over state if it’s clicked, (so people know what page they’re on) until another button is clicked in which case it would do the rollout animation, and then the new button would stay clicked.

I found this tutorial, which is basically what I want to do:

But the scripting is different I’m not sure how to make it work with what I already have, and I don’t really want to start over completely.

Can anybody help?

Any help would be much appreciated. Thanks!