The Elder Scrolls IV: Oblivion Cheats

How to Duplicate
switch weapon to fists.
before the punch is done open inventory.
go to your books.
select a book that you have multiple of.
(cannot be stolen)
press x on that book as many times as you have it. (it works for me when i click it 5 or 6 times)
then page over to whatever item you wish to duplicate.
drop that item.
then exit inventory.
there should be as many items duplicated as you have multiples of the scroll.

Now certain items will not duplicate, like nirnroots or scrolls.
Also if you have multiples of an item you are duplicating drop all but one of them on the ground before the duplication process. (like arrows for instance)
It just makes things easier.
(thank Satchel for this info)

Easier Version
1.switch to fist
2.punch o
4.go to books 3 to 5 times only
6.drop item u want
8.pick up
9.sell happy =)