As said above, you have to get the libraries. You'll probably find them in the edain_maps.big (if not, then edain_data, but I don't think it). Search for any file something like "Spieler" or "Player" in the name. (spieler is german for player) Nearly all others should have something with KI (german for Ai) in the name. Open it with the worldbuilder, open the scripts of the map and search for something like "Start" or "Begin" and then look for epic. This script should have an action, which is called "Set command points to 3000, maximum 18.000" or something like that. Change that and then overwrite the old file in the big with your changed file.
I haven't opened this files for a long time (someone else is responsible for them), but this will change the commandpoints of the epic battle mode.