I'd only played the combat demo back in the day, and man was I glad when I saw this on sale last week.
I purchased it on the spot and played about 400 turns total against Normal AI in various games, but man I get my butt kicked every time at around the 100 turn mark.

Well, to increase production of all your buildings to 200%, type "produc" at the main menu before you load or start a game. Just ignore the Options screen that pops up when you press "o" and keep typing.

I think the cheat also applies to AI, so you won't get too much of an advantage, and the expansion period before you can actually fight to win comes up much faster.

I'm currently on my 100th turn against Easy AI and steadily on the path to my first world domination :)
Gotta kill second-place Holland soon, though!