To enable HDR and AntiAiasing:
1) Copy/overwrite the files to your existing Farcry game.
2) Start the game and Select your desired FSAA mode (2-4-6) in the Farcry video menu.
3) Go to the console (~) and ...
type _FSAA 2 now press Enter.
type _HDRRendering 1-11 ("7" looks best, "2" is also nice and has better performance) again press Enter, exit the console (~) and enjoy.
Tip: for best performance in outside levels, don't change your "e_vegetation_sprites_distance_ratio" value, leave it at default = "1.000000"
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