Once I get done with all of the historical starts, I was thinking about going back in and just doing mini-scenarios for Rhye's mod... Similar to what I'm doing now, but on a more invasive scale. I'm trying my best now to not change too much, to just shape the world as it was at each civ's birth... I'm hoping this makes the UHVs more attainable... Once I finish all of the civs, I was thinking about a Roman conquer-the-world style scenario that would start later, maybe 550 BC or so with a more built up Rome and larger beginning army.
But I agree, the Roman UHV is pretty hard... Especially with the Romans being born into my 750 BC created world... In 750 BC, Greece is just beginning their expansion and Babylonia is pretty powerful... I might try a game at work this weekend with my save and see how far I can get toward the UHV as Rome...