TMPL_5241_MXci.txt
Reserved: 4-byte zero fill
Pad: 2-byte zero fill
NumClasses: list (2-byte one-based item count)
  ClassID: 16 data bytes
  ClassVersion: 4-byte integer (decimal)
  Pad: 2-byte zero fill
  NumIntfs: list (2-byte one-based item count)
    InterfaceID: 16 data bytes
    InterfaceVersion: 4-byte integer (decimal)