I'm not positive if vdub works with vista, but here are all the links you will need.
vdub mpeg2
huffy codec
You don't need to download the huffy codec, but it is pretty much a raw compression so you get really good quality from it
clicky
If you need help with settings or anything just let me know, I may be able to find the tutorial I wrote on it for Sticks, or you can search the video editing forum for it somewhere.