There is a problem in saving the game using a CLEO script. When you load a game that was saved using a CLEO script, the gang territories/zones will appear uncolored on the map. The gang wars are NOT disabled, you can still start a gang war but the colors of the zones don't appear on the map. This mod fixes that.
Usage
Put the file GangZones.cs in you CLEO folder.
Press TAB+G after loading the game to recolor the gang zones.
Note: There is a long part in the storyline during which gang wars are disabled by default. Do NOT use this mod to recolor gang zones if you are in that part of the storyline. However, if you do it mistakenly, I don't think it would cause any problems.