[Oggy ben Doggy]

I'm relativly new to SEIV, and I hear that one way to get a good challenging game is the use of mods, like the TDM modpack 1.61, which seems to be popular.

I dimly recall hearing that to get the custom AI files to be used, you have to manually add the races? Is that true?

And how do you increase the number of stars?

Finally, is there a mod out there that will place a "random" ringworld in the map?