Since playing this game everday since launch I have effectively reduced my IQ to just above 55. With that in mind I cant seem to find users in the forum and further cant find the fking thread on a custom config. try this

http://forums.steampowered.com/forums/showthread.php?t=1827479

I think non steam works like this

C:\Users\[your user name]\Saved Games\Crysis2\game.cfg (put the crap in the above link into this file)

Now you too can enjoy the benefits of a a higher fov. Such perks include being called a speedhacker an inciting mass paranoia amongst the other players causing attempts at votekicking.....lol