This packet is used by the god client to perform various tasks, most of them related to adding things.

Offset Type     Name             Description
------ -------- ---------------- ------------------------------
 0000  BYTE     cmd
 0001  BYTE     subcmd
 0002  USHORT   x
 0004  USHORT   y
 0006  USHORT   itemid
 0008  BYTE     z
 0009  BYTE[2]  extra

subcmd:

0x04 - Add New Dynamic Item
0x06 - Hackmove Request
0x07 - Add New NPC
0x0A - Add New Static Item

UO Protocol