Transitions Between External SWFs

I am trying to create drop-down menus that come into my movie. I would like to have a button on the drop-down menu to close it and have the menu roll back up and unload the movie. Here’s a sample of where I am at: http://www.thecomputerwave.com/test/ I’m able to navigate with the screen going up and down but I am unable to figure out the code to put on the button in the loaded movie to allow the movie to go forward and then unload.

Any help is truly appreciated,
Thanks