How do you get non-playable Factions in medieval total war 2

Press Run and type in word (Medieval). You will be presented with 4 or 5 lines . choose the 5th- Files and press (open). Then press (Global)- then press (Maps)- then press ( Strategic-Conf) which will then give you a list of the playable and non-playable factions. Choose which non-playable factions you want and right press the mouse to cut and paste them into the playable factions list. Leave no gaps in the line code by deleting empty spaces and tidying up. exit and save and restart the game wherein the extra factions chosen will be able to be played....note that this does not always work with every computer system but it should do if everything is equal and working properly........................ Muttley