A quick little program written by RJayW, creates a .bat file that you can launch Crysis 2 demo with certain variables.......
V2 is ready to go........hopefully will improve peoples demos 
http://rush-zone.com/component/jdown...atid=12&cid=10
Version 2 of the Crysis 2 Demo Config
I have added many more options that should make the demo nicer to play.
Enjoy!
Changelog:
Layout:
-Tabbing added
-Simpler instructions added
-Logo added
-Separated buttons out – first find the Crysis2Demo.exe and then write the config
Controls:
-Mouse Sensitivity can be enabled or disabled. Un checking the box means that the previous/ ingame value will be used.
Graphics:
-Bloom/HDR option added – multiple variables set that makes the game less shiny
-Motion Blur – now seems to disable
-Multi GPU option added – if you have more than 1 GPU set to 1
-Multi Core CPU option added – if you have a multi core processor set to 1
-FSAA - Full Screen Anti-Aliasing option added
-UseEdgeAA - controls the level of edge blurring set to 0 for least
-Anisotropy Filtering option added
-TextureFilter option added – set to bilinear for least
-Shadows option added – 0 turns them off
Sound:
-Enemy Player Hit Feedback option added – should makes a thud noise when you hit a player with bullets
http://forums.steampowered.com/forums/showthread.php?t=1776333
@TheVoxelman on twitter
