Fable: The Lost Chapters Cheats

Normally, Silver Keys don't duplicate. After you get one, that one is gone from the map. However, you can get as many as you could need during the "Save the Archaeologist" quest by using the Hero Save exploit.

During the "Save the Archeologist" quest, fish in the pond across from the Demon Door and get the Silver Key. Save your hero. Now load the game you just saved. The Silver Key you fished up is still in your inventory. Go back to the pond and fish again for another Silver Key. Continue this process to get all the Silver Keys you'll ever need.

In the middle of a quest, if you use a hero save and reload the save, you will start at the beginning of the quest as if you had never begun, and you will retain all items that you obtained during the last run of the quest. This is especially useful in the Arena, where vast amounts of money can be made if used right. This exploit can also be used to get infinite silver keys, potions, etc if used during missions. If used too many times, this exploit can cause damage to your saved game.