Ultima 9 .FLX file format
=========================
Revision 1.00 7th Jan 2002


The FLX file's used in Ultima 9 are very similar to those used in Ultima's 7 and 8, and follow the same purpose : to group individual files of a similar type into one parent file, very much like a zip file except there is no compressing, and no storage of filenames.

A general FLX file is made up of three things : A header, a file information chunk, and a file data chunk.

The header basically contains room for a comment, the total filesize, number of sub-files, 

File information chunk contains the offsets and sizes of the individual sub-files.

File data chunk contains the actual data for the sub-files.

HEADER FORMAT
-------------
Offset      Size      Description
 0           0x50      Comment space
 0x50        DWORD     Number of sub-files (n)
 0x54        DWORD     2
 0x58        DWORD     filesize
 0x5C        DWORD     filesize (again)
 0x60        8         all zeroes
 0x68        4         1
 0x70        0x20      all zeroes

FILE INFORMATION CHUNK
----------------------
Offset      Size      Description
 0x80        8*n       4 bytes : offset of sub-file
                       4 bytes : size of sub-file  

FILE DATA CHUNK
---------------
Contents vary depending on flx file (obviously :) )


Written by John Larcombe aka TumbleWeed Dragon
tumble_weed@hotmail.com
http://www.iinet.net.au/~larcombe