How create new item openNos

Hello guys i don't know how create new items on my server. I know how to create in navicat but in game the new item is not good because the icon is "?" and its all time a general weapon. so how can i create a item with icon, description ? its a client modification ? tanks for help and sorry for my english :D .

Have Fun xD
You can Change a Old Weapon via Serverside(Database) the Level,Stats...
Via Clientmodding can you Change for better Style the Level and more^^
How? Learning Self or Pay User who can this :P

simple learn by doing
or $ for it :P