When you're on the "choose your civ" screen, press esc and type in
your own!
 
Version 1:
Hold down <shift> and press 123456789t.
Older versions, ALT-R will randomize enemy leaders.
 
If you look at the civs using the Shift-56 cheat and F7, civs can go
into "Vendetta" mode and be more inclined to go to war with you, charge
you more tribute, etc.
 
You can choose your own colours for your tribes if you use debug.  Get
into the directory and type for example --debug civil0.sve When you get
the prompt from the debug routine, type d for display.  The computer will
then print out the first 80h bytes of the file.  I believe it is the