Yes there's a way to do it, I've done it for mine (Not the way you want but it's perfectly possible). I use the vB Page script so vB powers the pages, and had several people do scripts (paid of course) for me to integrate into vB to power other sections - but within vB.
The vB Page script is free and can be found here at vBulletin.org just do a quick search

I'm sure you'll figure the rest out and edit accordingly etc.