Yeah, named for famous Pasha's RAND games
Nation selection is simple: you get one nation from group A and one from group B. You can change one nation to undistributed ones from same group [you don't know which ones are free and you cannot change back]. You decide with your teammate who plays which nation.
You can [should] pick your teammate. You can talk with him about everything, you just cannot say what nation you are. And you just cannot communicate with other nations/players. So you are on your own, no trades or alliances.
And yep, Troll Kings will be removed. I may add something else there, considerably weaker though. Maybe smth from Endo's mod site pack [which I will probably include too].