Ok, so I hope I'm not crazy.
I took the skins offered with I purchased the product, expanded them in the web\App_Templates folder with the names of Skin_2, Skin_3, etc...
Then I went to the default.aspx page and added ?skinid=2 to it looked like this:
http://localhost/default.aspx?skinid=2
But nothing happens. Documentation doesn't really mention this but I know I read it here in the forum somewhere. Any pointers?