There is already a 90's submod. Mabye making a freeplay map with a big airport? Like, no police cars/Fire engines/ambulances, only personal on foot (I mean, where you are in one huge open building like an airport terminal. With a little section with coutches, TV and such where the Security (PD) Airport Firepersonal (FD) Medics (EMS) and Technicals (TEC) (Used for stuff that breaks down etc..) ..would rock..