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Note that there are only 2 files of this type, so it is difficult to determine exactly what is what.
Uint32 (0x00000003)
Uint32 (0x00000001)
Byte x 8 (0x00)
Uint32 (0x00000001)
ITG (Self)
Uint32 (0x0000002C)
Uint32 (Bytes Until EOF)
Byte x 4 ("WMAP")
Uint32 (0x00000002)

Byte x 32

Uint32 (Count?)

  For Each Count?
  Byte x 32?