When you’re back from restarting, open the loader again and insert your key one more time. A new window should be displayed. Select the game, in this case Modern Warfare and click LOAD CHEAT.
*A final window will appear. Click No by default (No other cheats)
The loader will self close at this point. Proceed to the next step.
Note 1: Once the cheat has been loaded, you can open the game as many times you want and the cheat will be loaded. No need to reinject until you restart your machine
Note 2: If you have used the Spoofer, restart your machine before reinjecting again
Note 3: In case the loader ask you to restart the machine, do not restart, simply, open the loader again.