I wonder if anyone runs this game on CF / SLI?

I have the flickering issue running in full screen, same as Crysis 2.

Although I have solved the problem in crysis 2 by renaming the crysis2.exe ----> bioshock.exe, but when I rename shogun steam just won't start the game, saying it's not ready (whatever that means )

I could run it in windowed mode (and the problem disappears), but it disables CF so I don't consider that as a fix.