I think their "vision" of Halo 2 was more than the Xbox could handle. But, hey, at least they got a lot closer than Killzone, aka, Halo killer. Halo 2 on Vista, crashes aside, seem to have a lot less of the rendering in your face glitches that you mention. Give it a try when you can. If your PC is beefy enough, the game also feels more intense because you can have it running at 60fps instead of 30fps. I think it still looks pretty good at 1900x1200.