if you have problems with the models join rally race and zombiemod. youll dl the skins from there then.
killing each other for no reason is not allowed and for the rest of the time you just play your roles. as cop you enforce the city laws. as mayor you can set laws (not totally retarded ones) and the cops will have to enforce them too then. as rogue you can just sell weapons which is against the city laws so the cops might be hunting your ass down there are more things coming up like jobs, money printers and what not. but its already awesome now.
for the basic rules look up the thread for it. its somewhere on here.