Hi,
1. Add the flash movie and name it.
2. Add the image
3. Select the image
4. Click on the plus (+) button in the behaviors panel and choose "Control Shockwave or Flash" from the menu.
5. Select "Play" and press OK.
This will add a behavior in the panel. By default, it will be triggered by the "onLoad" event -- change that the OnMouseOver.
John (Macromedia)