Hey!
I also use the vB2 Sryle for my 3.6
Forum. I'm upgrading it these days to 3.7 and also porting the Style to it. I think it's enouth to port the main pages of the forum: Forumdisplay, Subforumlist, Threadlist, Postlist and Postform to make it look retro.
I can post the Style If you need it. But I don't know if it is possible to export the whole templates. It will look like that:
http://www.wartower.de/forum/. The Forumdisplay + Subforumlist is finished. I have to finish just the Threadlist, Post- and Postform.
Bye
Perpetuum