Im sure this could be done if:A,there was no fire. B,atleast one hydraulic system and flight controls remained intact.C,ability to find runway long enough (you may not have thrust reversers)Boeing claims controld flight can be maintained on ONE engine.I think the procedure would be somthing like;Dump exess fuel,set rudder/elevator trim to compensate,throttle up good three engines,cut fuel/electrical to dead engine,determine gear/brakes/flaps status,declare emergency and get clearance to nearest suitable runway.If no airport is to be had,ditching is an option-or if all else fails,go for the nearest corn field!Under this scenario-the loss of one engine,and ONLY the autopilot,not the rest of the electrical system,I think the flight could continue on to its destination without the passengers even knowing there was a problem,but I could be out to lunch on all this.We need an actual 747 pilot to chime in on this and educate us.Strange this topic should pop up,as just last night I was practicing barrel rolls in 707-200,as was done the -80 prototype

To bad I cant make a living out of this,but it would probably kill me.