15 A7 FC 0B = Magic {Offest - 0 | Length - 4}

01 00 00 00 = Version? {Offest - 4 | Lenghet - 4}

?? ?? ?? ?? = Offset for CTPK Magic {Offest - 8 | Length - 4}

0? 00 00 00 = Changes depending on file. {Offest - C | Length - 4}

?? 00 ?? 00 = Changes depending on file. {Offest - 10 | Length - 4}

?? ?? ?? ?? = Offset for some values at the end of the data {Offest - 14 | Length - 4}

?? ?? ?? ?? = Offset for some values at the end of the data {Offest - 18 | Length - 4}

?? ?? ?? ?? = Offset for some values at the end of the data, the simplest ones end everything at 0 {Offest - 1C | Length - 4}

The ? means it can change depending on the file.