Hm... I don't think you would need an upgrade ComDriver (except for the Video Card perhaps) because Vista is just taking about 800 PF usage, not physical memory usage. So it's only using about say... 400 MB or so of physical memory, and since you have 1024 MB(even the person in the article seems to have 1024 MB), that wouldn't be all that much. At first even I thought it was 800 MB of physical ram, but apparently it wasn't so in the screenshot.

So really I think the big problem isn't that Vista is taking too much RAM, the problem is that Vista isn't better than it's predecessors (XP or Server).