One of the fundamentals of fundamentalism is that it is anti science. A fundamentalist government would have a radically slowed research rate to compensate for its plusses (free support Fanatics, zero war weariness, massive draft and MP effect). There's no way to mod this. What's needed for Civ4 is more gov options, if indeed Governments still exist. Why is building maintenance either 100 percent or 0 percent? Why can't I set building maintenance to 50 percent cost for a Republic, where cities foot some of the bill, and 200 percent cost for Communist society in which nobody cares? Why can I not set maximum Research spending and maximum Entertainment spending to 20 percent each for Fundamentalism?