XeNTaX

Hi, ive started looking at ground control 2's .sdf-files. This is how far ive gotten:

DWORD ident
DWORD directory_offset

<lots of data>

at directory_offset:
DWORD uncompr_size
UINT24 compr_size
BYTE flags
<BYTE[compr_size]>
:EOF

i havent identified the compression scheme used, it starts like this:
5D 00 00 80 00
do you recognize this signature?

No, but thanks for the info!!