-- Header ---------------------------------------------------------
(0) [4 bytes] = unknown, possibly some sort of checksum
(1) [4 bytes] = unknown, possibly some sort of checksum
(2) [4 bytes] = total size of files without separate file headers
(3) [4 bytes] = amount of files
(4) [4 bytes] = empty
--- File ----------------------------------------------------------
(0) [4 bytes] = lenght of file name + something else in bytes
(1) [4 bytes] = file size in bytes
(2) [4 bytes] = empty
(3) [(0) bytes ] = file name + something
(4) [(1) bytes] = file content