There is no secret. I am working (well, actually I'm NOT working becouse some RL things don't let me do something for Civ
) on a Bronze Age scenario. If you understand reading german, you could follow the german
project-thread in our forums. Later, I hope, this time the scenario will be translated into english, but probably without the longer pedia texts, wich are actually not written, even not in German.
For the changings you are right. I have added some montains, for example on the edges from the map (I hate settlements on that places.
) and have some coastlines changed too. Becouse of adding Persian Gulf and Kaspian Sea I still have to replace Euphrat and Tigris and this again leads to further changings... If you are interested in that changings, you may look at
this attachement in our forums. Its the same like above, but scaled up to 150%. However, it's a big help, what you had done (and probably will do). It allready saved me a lot of time.