Reason to make these pedestrians separate from others is because of the way they are restored, like some of them supposed to be used only on certain missions, events, etc. but this is the only way for now.
All of them simply spawns on certain locations and just hangout with other models, some of them can reproduce various actions, like smoking and... that's all, but you can use VPA in which I add more actions to them.
WARNING, this stuff was not tested on EFLC, and probably going to crash whenever you going to start game.