re: Tips On Achieving Crisp Edges with Fondant?

so funny that you mentioned this cause yesterday I came across a couple of sites. Here is one of them. She does the upside down method.
http://jessicakesblog.blogspot.com/2011/06/video-tutorial-upside-down-frosting.html

and here is another one that shows with the ganache. On this she puts another cake board on top.

http://www.notquitenigella.com/2010/11/04/how-to-make-a-two-tier-wedding-cake-with-faye-cahill/