Just thought I'd share what I have found out about vsync and d3doverider not working with windows 8.
I have tried configuring three different config files for Metro 2033, using d3doverider and forcing in catalyst control centre. Nothing worked to get vsync working until I tried Radeon pro, just create a profile, force triple buffering and vsync and you are good to go:
Hope this helps. --- I dont suffer from insanity, I enjoy every minute of it!