At the bottom of the file, add lines like: bind X "god" (replaces X with any unused key). Save the file.
If the steps worked, a grey/black overlay will slide down from the top of your screen. Congratulations, you are now in the console! how to enable console in call of duty modern warfare 3
C:\Program Files (x86)\Activision\Call of Duty Modern Warfare 3\players2\ At the bottom of the file, add lines