They are used by typing them into the saved game box. When the saved game is re-loaded I think the cheat then comes into effect. In typical Maxis form, none of them seem to directly affect your money or your ratings. After using one, send out Rick, trained to 100, to find the goody now planted on your island. They will have various effects like encouraging a constant stream of tourists for ever, or allowing you to charge double for exported wood and so on.
