Yes, I finally did it. I wrote a tool for Windows users. 
WVis is a modified version of Bengt Jardrup’s VIS tool. It’s the exact same program as the one you can get here…
http://user.tninet.se/~xir870k/
…except that it has multithreading turned on. Basically, you get 1 thread for every core/processor you have on your machine. This will speed up VIS compile times dramatically if you have a machine with multiple cores/processors.
Usage and syntax are exactly the same.
Enjoy!
WVis
http://www.quaketastic.com/upload/files/tools/windows/misc/WVis.zip