I searched everywhere to find out...

How do you put a simple pop up menu on a button in flash?
It's a no brainer in fireworks etc, but how in flash?

You need to 'park' your clip in there.

- create a new movie, call it 'movie1'
- in the first frame, leave it empty place a stop() action in it.
- frame 2, create a new keyframe
- place the menu here after with a tween using several frames, or one menu image.
- place a stop() action in the last frame.

In your button actions panel, place this script on it:

on(rollOver) {
movie1.play();
}
on(rollOut) {
movie1.gotoAndStop(1);
}

Hope this works well for you.