[HELP] About "Amount"

Hello Friends someone can tell me where I can change an item so that it accepts accumulate? study in changing:
Cq_itemtype: amount and amountm_limit
I also change my itemtype.dat my client
so that he still appears a message of "durability" in item

ty!

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The last paragraph from this guide explains ur current situation better than I can :P

P.S. A forum search for stackable items would have been easier than making this thread