I would like to know how to able or disable the cultural flip. I am actually playing a scenario with a mod where cultural flips are not allowed, and I would like to change this. I suppose that it is possible to change in a XML file, but I don't know in which one and how to do it. I have to say that I'm not a scenario maker, so I don't know about XML scripting... Thank you!

Open the scenario in any text editor. Find the line which says " Option=GAMEOPTION_NO_CITY_FLIPPING". Remove it.