We were discussing TOT on modthesims.info and I saw the idea to create a subhood for the main neighborhood that would be designated as Egypt, so that I can have both civilizations going at the same time. I also like this because it means I can have more Egyptians without overpopulating my Roman/Greek neighborhood with Pyramids and the like.
I created a "business hood" as Egypt. That was the only way I could see to do it, other than making a downtown, which would make all the buildings look dark (nightlife). I have all of the expansion packs except for Bon Voyage, and I have the Teen & Celebration stuff packs.