Why not just try to install it and see what happens? Obviously don't make a template edit until you know it works, but you can browse to it manually if the install doesn't give errors....
http://www.yourdomain.com/forums/vbtrade,php - It seems in every 3.8 mod there's a dozen people asking if it will work on 4, sometimes for months... yet no one ever seems to want to try... I doubt vB would successfully install it if it didn't work and even so that is what test forums are for.... then report back an be a hero.