Is there any extension or process that makes it easy to prototpype a tree control like the one you see in the Windows Explorer or in Outlook?
You could fake one using swap image behaviors, though the menu expansion would be abrupt rather than a smooth glide, and clicking on it a second tome would not contract it. You would need to set it up to restore the original image onMouseOut. If you click on the image here
<http://www.playingwithfire.com/faketree.html> you'll see what I mean. I've attached the editable PNG file so you can see what I"ve done. You'll need to look in the Behaviors panel.
Anything as sophisticated as true tree navigation would need to be done in Dreamwweaver.