I managed it in the end actually, but could not play any of the roman factions, only the gaul, greeks, thrace etc. I thought this was because the Brutii were originally not on the map.

The following works, remember to copy the sons of mars settlement and regions name text file in data/text and rename it or it will have problems.

; Custom campaign script generated by Romans Campaign Map Editor

campaign rise_of_rome
playable
greek_cities
thrace
gauls
end
unlockable
end
nonplayable
romans_julii
romans_scipii
romans_senate
slave
end


start_date -329 summer
end_date -265 winter


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; >>>> start of landmarks section > start of resources section > start of sound emitters section > start of events section > start of factions section > start of diplomacy section > start of regions section