New WPMUDEV member here. I had bbPress forums working w BuddyPress already, how do I

get my new WPMUDEV forum to incorporate my existing BuddyPress forums? Or, alternatively, how do I create new sub-forums with the WPMUDEV forum feature? It only seems to allow me to add a single forum, with no ability to add sub-forums under it. Confused...

WP 3.6.1
BuddyPress 1.8.1
bbPress 2.4
WPMUDEV Dashboard 3.3.2
WPMUDEV Forums 2.0.1.8
WPMUDEV BuddyPress Corporate theme

I had created subforums w BuddyPress/bbPress but don't see any way to add more than one forum w WPMUDEV, not to mention being able to nest them.