Instructions
Launch "The Sims 2" or one of its expansions. You will need to have the game disc for the most recently installed expansion in your computer's CD or DVD drive.
Hold down the "Ctrl" and "Shift" keys on your keyboard. While holding these keys, press the "C" key and then release all of the keys. A small command prompt will appear on your screen.
Input a cheat code and press "Enter." Keep in mind that cheat codes are case sensitive, and some cheat codes can only be used in certain areas of the game.