How do you do the duplication cheat on Oblivion

first go to a scroll that you have at least two of (or more) then go to an item that is not equipped (that you're not wearing/using) and drop it. when you go back to the game, you will have dropped more than on. an example is click on a scroll you have more than one of, next you drop a steel helmet. when you get off of your journal and go back to the game, you will have dropped two or more. (i did this on a playstation3 ).