A few quick things... For NVIDIA users, that update their drivers. When you stall your drivers, the first thing you need to do is go into the control panel and set them to single display mode. They default at multi gpu setting . Like were all running sli or crossfire setups. This will give a decent performance increase.
I also found the shimmering bad.. I went in the config file in the 1C documents folder.I set Drawifnotfocused=0 to 1. I didn't see a hit in frames, and it seemed to reduce the shimmering quite a bit. I also don't notice the constant draw in circle that is around the aircraft. Possibly helped with studdering.
I'm not saying this is the HolyGrail of tweak.. but it seemed to work well for me.. give it a shot and report your results..
Oh.. and Im also running the Gtx 460.. but its the 2gig version running at 800 Hz..
