The FAQ states that it is missing because it may be incompatible with the map. However, this only applies to the version of the mod used in the Scales of Fate campaign - small windows where you must click OK or Cancel are not scrollable.
The one embedded in the Heart of the Night map, or posted in the Mercenaries map thread, does not have this "feature" and is compatible with this map. Therefore, if you make an update, it would be quite possible to add this mod to the archive or embed it into the map)