The script is opensource so you can modify it according to your needs. however you just need to change the server side exports for the items management and the item registration in the inventory.
exports[‘qs-inventory’]:AddItem(src, Config.Item, 1) for add item and
exports[‘qs-inventory’]:RemoveItem(src, Config.Item, 1). for item registration if you use qb I don’t think you need to do anything but if you use esx you need to go to qs-inventory/shared/items.lua and add this :