To perform this save the game and trade the item to be duplicated to another player for no item. Then exit to the 'Main' menu and answer 'No' when prompted to save the game. When you now reload the previously saved game you will still have the previously traded item. Have the other player save their game and have the item traded back to you. Save the game and have the other player exit to the 'Main' menu and answer 'No' when prompted to save. Both players will now have the same item.
Added by: Sanzano May 28th 2009, ID#2873