The codes only work when the trainer is installed. The codes were submitted by guy moskovich, so you might try emailing him for further details. Bitmap Brothers deny there are cheats for the game, because they removed the cheats from the production version. Many designers are very strict about how you play their games.
Many game companies feel that cheats detract from game play.
But mostly, game companies are afraid that cheats will somehow cause them to use revenue. When talking with them, they have some very convoluted logic concerning these issues. As a result of these opinions by the designers and game companies many cheats are removed from the final game. We have always contended that cheats are optional. No one forces you to use them.