You can change the settings in the savegame SAVEx.GAM

 Offset   Contents

 00-05    names of the planets

 14       material A
 15       material B
 16       Material C  where 00 = not present, 01 = present
 1F       planet status  where 63 = free, 00 = player is owner
          01 = computer is owner
 21       base
 23       depot
 24       powerplant
 25       production
 26       mine
 28       dock
 29       schild   where 63 = not present, 00 = present