The challenge:  start with a modern Adam and Eve and rebuild your save file's sim population with only their descendants and any alien abduction babies.  You have "won" this challenge when all possible lots are filled with sim families.  If you'd rather skip the MCCC setup, you can just grab my settings file.   That should copy my settings to your game, if not, please let me know.   This challenge is apt to evolve over time, as new ideas/suggestions come to me.  Keep an eye out for the