0x00 dword = #AMB

0x04 to 0x0F = unknown, seems to be part of the header.

0x10 dword = number of files

0x14 dword = unknown

0x1C dword = address to the filenames

0x20 dword = address to beginning of the first file

0x24 dword = size of file

Followed by FF FF FF FF 00 00 00 00, then new file start address, and file size, check the dword at 0x10 for amount of files.