Choose a map at the war web screen. Select any scenario and arm structure. Wait for the game to load, then type 40hourweeks and press ENTER at the force deployment map. Exit to the main menu, and enter the options screen. Click on "Detail". A "Cheat Active" button marked with a red X will appear. Click on that button to enable cheat mode. The red X will turn into a green check mark to confirm correct code entry.