ssgfix.exe is a command line patcher to update *.ssg files
from Mr. Ekted's SSVCR version 1.2 or lower to work with
version 1.3 or higher

just make sure ssgfix.exe, the game file you wish to update, 
and the map level it uses, are all in the same directory

then run ssgfix according to the follow syntax:

c:\>ssgfix <filename>.ssg

which creates a new file called <filename>_v2.ssg which can
be used in SSVCR 1.3 or higher without the need of a map level.

for example, if you have mygame.ssg which requires cool.lvl,
then put mygame.ssg, cool.lvl, and ssgfix.exe all in the same
directory.  then in that directory type

c:\mydir>ssgfix mygame.ssg

this will create mygame_v2.ssg which you can use in SSVCR 1.3 
or higher

if you fail to put the correct map file in the same directory,
the command line will return an error telling you which file
it needs to compete the patch (in the above case, cool.lvl)