So my Fallout New Vegas stutters like nobody's business whenever my character walks. Framerate bouncing around from 15-45 randomly. When I jump the problem goes away, but whenever I walk on the ground it starts up again. I've tried lowering every setting, various .ini 'iFPS=60' tweaks, and the Fallout New Vegas Stutter Remover, all without result. Verifying my Game cache didn't do anything either. I was able to run Oblivion and Fallout 3 just fine, so this is extra strange. Most of the fixes out there are for minor framerate ticks, not this jerky movement.
Any ideas, or should I just jump my way through this 100+ hour game?