NPCs moving around

Hi there!
I am new here and have some questions. To keep it clear and understandable I will post them in few threads so do not call me spamer, cause my intention is just the opposite :wink: And I am sorry for my English.

Ok, so let us come to scripting. I have made some basic AIs. I can make them moving to target point or chasing the player but it is not what I want. I want them just moving around to a completly random targets as a part of enviroment. I want them to be my citiziens and just walking trough the city, sitting in some place, than standing up and moving into another place.

(and a little bit more, bu I would love to have explained separatly- is it somehow possible to make them return to thier houses and sleep at night?)

Thanks so much!