If you find the Items...
defineItem.h -> Here you make a define > #define II_WEA_SWO_EPVP_TEST 240717
you are only allowed to use the ID (240717) once per ITEM !!
propItem.txt.txt -> Here you have the Name from the Item > IDS_PROPITEM_TXT_15343 Test Item
The SpecItem.txt or propItem.txt read the IDS_ from the propItem.txt.txt if you dont write it in '' ItemName '' ...
now we only need the mdlDyna.inc to give the Item a design... Files\Model\Item_NameTestEPVP.o3d -> add only NameTestEPVP ... not ite Item_ and not the .o3d... now you added a item xd
if you want that i explain it bether write me a PN...
You are able to find anything using propItem.txt.txt