Nvidia VFW driver for Vista?

Does anyone know if there is a working VFW driver for an Nvidia 7800GT with VIVO?  I have 2 of these cards and would like to use one of them as a video in on my HTCP as the video capture is pretty good on it.  I have been unable to find any indication that Nvidia supports VFW at this point.  I am hoping that someone has a hacked driver or something.  I have other video capture solutions that do work, but I would like to use one of these as well.  Please leave a message if you can help 🙂