New Post: Treeview from MOSS 2007 List

I've built this out using JS CSOM, not SPServices b/c the web services can't handle folders correctly. To date, this is the only tree view library worth anything to write about:

http://wwwendt.de/tech/dynatree/doc/samples.html
http://wwwendt.de/tech/dynatree/index.html

This all works client side, so you'll be able to use it within your restrictions.

Cheers,
Matthew