Ok, problem solved itself. I can save maps that I modified, not maps I started from scratch. I remember reading that a map must have more than X objects or it will not be saved, but I cannot find it anymore.
I think that a street littered with corpses will add to the atmosphere of the game, especially if there are no living civilians in the map. I don't think that players take count of how many civilians they save, especially when those idiots walk straight into the line of fire. What do you mean with add a model and then reference a particular animation? Can I add a civilian spawn point and make him/her spawn already dead? It would be good!
Forgive me for this, but sometimes I think that the game could benefit from a darker atmosphere/graphics. I am working towards a "slum/drug den" RMA map, I think it would add to the atmosphere of the game.
By the way, I found this:
http://www.texturemate.com/ and there are some wonderful free textures. May I use them?