They will have the city names and leader pics of the civs you replace with them. To change the city names, find the replaced civs in "City.txt" and give them suitable names. To edit the leader pics is a little more tricky. Download the "GifXtractor" utility from the civ2 downloads section on this site, and open the "Mk.dll" with it. Then you can change the pictures, and insert more suitable pics.