Go to
http://jhywu.tripod.com/
The Toolkit allows you to store (save) and reload 5 different villages. The Editor allows you to fiddle with various statistics and villager characteristics.
You will find that some of the tweaks have odd results, so be careful about editing a game you care about. Also, the editor respects registration; i.e. if you havn't paid for Village Sim, you can't do much with the editor.