Be carefull with the all buildings & units cheat, because IIRC the cheat applies to the AI too.

I used this cheat a few times for making screenshots of the unit icons, and when I did so when 'playing' the Almohads, I got overrun by (no exageration) 4 crusades before 1100. I believe that I also entered the build everything in one turn cheat, so that may have speed up the process a bit...
It was a funny experience anyway.