I know how to get more than 8 players on Call to power 2. all you have to do is download the 27 player scenario and then use that player number as the way to go. now that scenario uses the earth map which is fine but if you would rather play a smaller part of the earth other maps can also be played with 27 players the thing is when you upload that scenario the earth map is too large and i cant get it to run it makes my game crash but the other great thing about that scenario is that as soon as that scenario starts working you can load a diffrent map and play a diffrent map. i prefer real world based maps. in certain time periods when i want to have up to 27 players. but theres only 41 players built into the game not all of them live on all the map regions of the world. but another great thing i seen was if you decide to have several diffrent barbarians all the countries that are not part of the 41 civs built into the game can be put in but they will just be called barbarians on the map but there will be several of these civs and each reprecentd by diffrent colors.
i dont recoment the australia map becasue it does not have alot of civilizations. but one map that does is called " North Atlantic" it has at least 27 civs but thing is they were never all located on the map at the same time. in the long ago days you could have some interesting barbarians like in the North america section on the north atlantic you would have native americans which could be made co-extensive with eastren woodlands culture and any native americans not in this culture can be some of the barbarian entities. Mexico however is very small on north atlantic only 2 or 3 cities like cancun and chumethual is the main ones. in the long ago times the mayans were there. Incas however get the shaft and not featured on north atlantic . thing is i have never found a map that the incas would be powerful at least on this aployton. right now im working on Japan -korea map and its almost finished i have japan and korea are finished and japan is 197 cities and korea is 104 cities far east russia is about 2/3rds done and manchuria china is only about 20% finished so its going to be quite a long game.