[Flash2004MXpro] Making a menu?!

Hi Im making a website and I am using flash in the header.
In the flash is a menu, with 4 buttons.

I need a script or somphing to do this: When a user clicks on the button “contact” I want it to load some other buttons below contact and the user must be able to click on them aswell.

http://img64.exs.cx/my.php?loc=img64&image=header.swf

There is the header i hope you can help me out…

The menu on the http://www.macromedia.com site (above) is an very good example.