Sounds logical and not to hard but you lost me at "all ya have to do is add another field to track parent and child and you have subforums of forums" lol
I can see why they would not want to add it as an option and support it because thats what makes vb set apart from threads. (my opinion only) If they were both the same there would be no reason bother going from one to the other.
totaly understandable.