Just tried the noSSAO mod as well as lowtex

Using the cross country mission as the test - 9fps on takeoff and 21fps flying around. I see no difference from the stock game. frown frown Yes I installed correctly and yes I put the correct parameters in the launch options in steam. Tried with a shortcut on my desktop as well. No dice.

running at 1920x1080 with all medium graphics settings
AMD 955 CPU at 3.7ghz
4gb ram
2x GTX 460 1gb factory OC'd SLI (sli disabled)

Envious of all you who are getting results hehe ;-)