I posted the exact same thing about a month ago and I can't actually tell you if I got the lag to work, because my old router doesn't like Vista at all. It runs at about 1/10th the speed it should run so It was always lagging. I ended up using a long ethernet cable from my router and it gives me the speeds I want. I'm going off to college soon and they have internet in the dorms so I'll probably just use ethernet anyways.
http://www.vistax64.com/network-inte...-problems.html
That link has some decent information though. My original thread regarding the same problem.
This link too.
Disable Wireless Zero Configuration In Windows Vista at WLAN Book.com