you need to edit some inifiles in /ini folder of client as well
dont ask me which one though cuz i dont have the names in my head

this is basically the steps u need to do:
1. add new itemtype in database in cq_itemtype
2. add the same id to itemtype.dat (hexedit)
3. make new dds,c3 files with same itemtypeid as the item u added
4. add the new items in the corresponding inifiles in the client
(adding it to cq_goods is only needed if you want to add the item to a npc but not necessary if you want to test it with /awarditem command)