I modified your scenario to have one civilization.
First its realistic, as its before great migration at 200 000 BC, and such scenario would be good for tests.
Image is from wikipedia
Isn't here options, that allows barbarians to settle into city, turn into minor civ and finally into full fledged one?
This way your competitors would create themselves.
That would simulate your population "leaking out"
Edit: Made it no preset civs.
Some civs spawned on other planet >.>
Also map doesn't have sea tiles...
So preset civs doesn't work - they spawn outside Earth sometimes
Here is my variantion of this map (using latest SVN and peppers modmod):
http://imgur.com/a/uD8xa
That map contains single civilization placed in Africa and possibility for barbarian cities to spawn.
I created map with different player configuration:
Egypt, Babylon, Greece, China, Aboriginals, Native Americans, Inca.
That one could be used for actual gameplay.
/trivia
These maps use less than 1.5 GB on start.
Map size is 200x120 - Gigantic and Earth size is 60x120 - effectively size between Large and Huge with its 7200 plots.
Map size pace modifier is Gigantic, diffuculty and speed are Noble/Eternity, but these can be changed.
/endtrivia
On map with 7 civs Asian (China/Aborigens) and American (Native Americans/Incas) civs are relatively spaced.
Mediterraen civs (Babylon, Egypt and Greece) are fairly close to each other.
http://imgur.com/a/0melh
Added stone bonus near each starting civ and moved one of natural wonders away, so Egypt doesn't get free cash instantly.
Removed random trails left from original player configuration.
Removed unnedeed barbarian/animal pseudo civs from map files - game makes them automatically.
Player configuration is now as pristine as it can be - removed unnedeed entries in team/player section. Also removed revealed tiles and units.
Revolutions and barbarian civs are are off by default.
Here is example.
Here we can see founded cities.
http://imgur.com/a/vf2OS