Different ship sets in Carrier Battles mod
 

Does anyone know if you can add and play other ship sets in Carrier Battles? I recently tried to start my first game using that mod. I added a ship set that is not already in Carrier Battles. But strangely enough, I was not able to build colony ships. The colony ship image does not appear in the ship design screen.

Is there something about that mod that only allows you to play the races that are already incorporated into it?