Sorry to reply so late in the development of the mod, but regarding the names of the civs in the game, I felt I had to speak up. You are right in one sense, that you can do something in Civ4 that you couldn't do in Rome Total War, and that is correct a common misconception concerning countries and empires during the time of the crusades/early medieval period. In Medieval Total War and all other games I've seen-with the exception of Europa Universallas-France, the Holy Roman Empire, Italy, etc. have all been portrayed as a single nation state. This is complete false. Much to the contrary, nations such as France, the Holy Roman Empire, Spain, Italy, Russia, and others were fractured into a number of large and small feudal states. In the early period of the middle ages, France, for example, was divided up into territories including: Normandy, Anjou, Brittany, Toulouse (actually the largest and most powerful french state), and others-all owing nominal loyalty to the King of France. The Duke of Normandy even attacked and took over Brittany in the mid-eleventh century-which would have been like New York taking over New Jersey, and the President of the United States not being able to do anything about it.
So, what I am suggesting is that instead of having countries like France, Spain, Holy Roman Empire, etc. controll multiple cities, but to have them control one or two cities, with the other French/Spanish/German cities as barbarian cities that can act independently, and be conquored. Indeed, that is how France was unified, through conquests of many Kings over a period of about 300 years. Hell, it was not until the end of the 100 years war that France finally drove out the English-if you can call them that (the English monarchs of the middle ages were French, their tactics were French, and save for their archers most of their armies were made up of Frenchmen...that's right, England's most celebrated monarch, Richard "the Lionhearted" only set foot in England twice, and only spoke French).