I have also tried renaming the crysis 2 exe to that of other games, with no success. The ones that eliminate the flickering on the shadows, nanosuit and nanovision such as the Bioshock, and Rift profiles result in poor frame rates and the ones that give me good frames like crysis 2, crysis and metro 2033 suffer from the terrible flickering.
I am beginning to think i cant fix this and it will have to be either nvidia or crytek which is a shame because i am absolutely loving the game and want to enjoy it properly.
I use win vista 64 bit
i7 940
GTX 295 with 267.24 beta drivers