Just incase you didn't know, you can enable Sparse Grid Super Sampling AA in Crysis 2 rather than the crappy MSAA it comes with.
First Download the NVIDIA Inspector
Add this to your autoexec r_PostMSAA = 0
Use these settings in the screenshot. Note the Antialiasing Compatibility
Of course using SGSSAA will really hurt performance and I'm in the 20s maxed out on my GTX460@1920x1080 with this SGSSAA setting. Looks nice though.