Create a new config file. Lets call it tweak.cfg. Copy all that to the new config file.
Place it in the config folder. Now start Crysis with the command line: crysis.exe +exec tweak
Or just add +exec tweak to your Crysis shortcut.
Or put that line into a bat file in your bin32 folder and make a new shortcut to it.
* Note 1, Vista support sucks for both DX10 and DX9, however running this config in DX9 mode under XP will give you almost the same visuals as DX10 under Vista.
and either delete all the *.sfd files or do what I did, create a backup folder in the video folder and dump all the *.sfd files there. Now when you launch your shortcut (without the above switches) it will go right info the main menu.
To quickly exit, pull down the console (~) and type quit