[Krsqk]

The workaround is to create a modded SystemTypes.txt (back it up first!!!) with a system type that includes your desired abilities. If you want a lot of these systems, then you should probably get rid of all the other system types, too. Enter the map editor and generate a map. Look for systems which have the abilities you added. Change the coordinates to get them where you want, add stars, planets, asteroids, etc. Delete any extra systems. Add other systems by hand, rinse, repeat.

Not exactly the easy way, but I don't think there is one.