Drop-Downs and Fly-Outs... any tutorials, movies or instuctuions?

Hi Folks, Getting my feet wet with XWD and I can't seem to find any instructions as to how to create Drop-down and Fly-out menus. I found some examples on the "Show Us Your Site" thread, so it must be possible. Anybody? :confused:

Here's a lengthy thread discussing Drop Down Menus.

http://www.talkgraphics.com/showthread.php?t=36670

I learned it with this video:
http://www.youtube.com/watch?v=lMvRKJtpsu4
but try not to only repeat each step but to understand what and why he is doing everything.