[dogscoff]

Also, if you want a race from your unmodded game to appear in a mod, just put an empty folder for that race in the modded folder, ie

se4/devnullmod/pictures/races/vikings

This can cause problems though, because the game will then try to use an unmodded AI for the modded game.
If you have a mod-specific AI for it you can put just the AI files in the folder above and the game will still pick up the images from the unmodded folder. (se4/pictures/races/vikings)