BYTE[1] 0x90 BYTE[4] Map Serial BYTE[2] Gump Art (usually is 0x139D) For Corner Image BYTE[2] Upper Left X BYTE[2] Upper Left Y BYTE[2] Lower Right X BYTE[2] Lower Right Y BYTE[2] Gump Width BYTE[2] Gump Height BYTE[2] Facet ID (same as in facetXX.mul files)