I just thought I'd throw this out there to the people looking for the mega items option:
The infinite items option seems to kick in when you use anything less than the total amount of an item. So an easy way to duplicate is to get at least 2 of an item, then rest at a bonfire and add 1 of the item to the "item box." Do that to your heart's content, then move some back into your inventory and VoilĂ , item duplication.
The only catch is that you have to possess at least 2 of the item, which is kinda frustrating for boss souls at the moment.
[Edited by Ang3l, 4/25/2014 1:44:16 PM]
thanks for the info ! it worked