I did that as I had heard the same thing, I ran it and installed the initial updates. The thing is it causes mobo screen to freeze on startup, before vista even loads.
The timings you listed, is that the manufacturers claimed timing that you manually set or is it what the BIOS has automatically set? Have you changed the command rate (1T, 2T)? You could try physically swapping the places of the RAM sets to their opposite slots. In my experience, you can sometimes get RAM with different latencies to work as long as the the RAM with the higher latency goes first. If you haven't manually changed anything (before the problem started), and that doesn't work either, you probably have a bad stick or two of RAM (just as multiple others have said).