if you use the random & wieghted planets then the maps work in ALL sins, if you use a plus planet then the map can ONLY be used with sins plus/solar plus ,daeadly & othe mods that include the planet type.
also the random & weighted planets increase the replayability of the map as each time the map is started it is different planet type at the location and if you add in phase lanes with a lower probability it is possible to force the map to path differently each time.
harpo