Hi, I know one guy who has built a total closure system (shuts all the windows etc when he locks the car) and as a part of this mod he also built in one-touch (what you're calling auto) for all the windows, not just the drivers one.
I can ask him for more details if you're interested but it does require some electronic knowledge and messing with wiring...
PM me if you want some more information on the process, I'll ask him...