Menu effect - pls help me

Hello,
I’m looking to create an action script code for the effect that is here http://img112.imageshack.us/my.php?image=transitionexplorersn8.swf&width=1024 .
File settings are as follow: Squeeze, Horizontal, Elastic, Out only, (tween axis - does not apply).

Can anybody help me with that problem? I do not know how to make the box stay unfolded.
It would be great if someone could design a box like that with a button and post it as a .fla, so I could better understand it.

All help is greatly appreciated!!! :ear: