I decided to try my hand at "making" races since there don't seem to be a lot of custom race mods other than Gauntlet. No factions, just foregrounds and matching portraits.
You can see the portraits here: http://www.nexusmods.com/galacticcivilizations3/mods/34/?
You may have to get the file here because the Nexus is apparently powered by a hamster wheel: http://www.mediafire.com/download/b1k5dkk0qutd06a/CustomRaces.7z
EDIT: Files updated