Man, I go days without a reply in the Links SQL PHP forum, and you guys are all over this one within minutes!

Glad you like the idea. I agree it doesn't sound too tough on paper, but I still haven't familiarized myself with the code well enough to say that with much certainty...

One tricky thing would be to make the virtual categories navigable. Linking directly to them from their corresponding real categories should be easy, but if they mirror the entire category structure, it makes sense to be able to click from one virtual category to the next.

Dan