Hi Joshua,
As Lynn says, the only info around for styling the treemenu is on
www.skinningtoolkit.comIf you come across any further info then let us know.
You can create something similar to this using the HouseMenu - If you look at the actual menu in use on Skinning Toolkit you will see that it expands and contracts depending on which menu items you click on.
This is set up using the same technique as outlined in this tutorial:
How to create Horizontal CSS menus in DotNetNuke using the HouseMenuHope this gives you a starting point, thanks,