Izengrimm, thank you very much for your kind words about CCM2.
The biggest map size in CCM2 is 250 x 250 (62.500 tiles).
The biggest map size in CCM1 is 260 x 240 (62.400 tiles).
The change in the map size was done to reduce tundra terrain, that is not settleable without the 'forest-trick'. So 'good old favorite CCM1' holds less tiles for settling than CCM2.
The victory conditions in CCM2 are the same as they are in CCM1. The diplomatic victory was disabled as in CCM the rulers in the menues are not named due to the mult-ruler concept in CCM and an election of a ruler without name and another ruler without name is not funny. May be you give your vote to your oppenent in that special situation, as you don´t know who is who.
500 turns (as it is in CCM1) were sufficient for victory in every succession game and all CCM2 test games I am aware of.
As well I have changed for myself those default rules for CCM1.biq long ago to be free to choose any number of turns and victory conditions as I see fit
In CCM2 I will need to increase the space between civs in "World sizes" tab.
I do not complain , it seems very easy to adjust any scenario in Civ3ConquestsEdit for everything one may need.