lets look at a weapon from my zitem for example :
Code:
<ITEM id="50039" name="Donate Large Sword" mesh_name="sword08" totalpoint="0" type="melee" res_sex="a" res_level="0" slot="melee" weapon="greatsword" weight="25" bt_price="0" delay="366" damage="37" range="300" ctrl_ability="0" magazine="0" reloadtime="0" slug_output="false" gadget_id="0" hp="0" ap="0" maxwt="0" sf="0" fr="0" cr="0" pr="0" lr="0" color="#FFFFFFFF" image_id="0" bullet_image_id="0" magazine_image_id="0" desc="Thank you for your patronage, enjoy your custom Weapon" iscashitem="false" />
Do you see the one called weapon? you change the word "greatsword" to "katana"