Put the item to be duplicated on the ground, then put a mana potion or another item on your belt. Walk a few steps away, then click on the item on the ground. Right when you pick it up, click on the item placed on your belt. Drop it on the ground. If timed correctly, it should turn into the item to be duplicated, and the original one will be in your inventory. This can also be done with money. Do not put both the duplicated item and the original item on the ground,or one will disappear. Note: This cheat will not work if the inventory window is open.