You should not really download and play these scenarios:
http://pages.zoom.co.uk/netdesign/
Because I don't know how many hours I've been playing... And I'm not done yet making the Persians regret being themselves... Urgh I need fresh air, but I'm not having it...
Everything's tweaked, the units, infraestructures, technologies, even the terrain. It's a different game, and it's MUCH better than the original Civ2, makes lots more sense. And I did like the original...