Just stumbled accross this. havent seen the movie airplane so I dont know how that was done, but someone with no experience in a passenger jet, will not be able to land it MANUALLY. That is just not possible.However, some planes are equiped with an autoland equiped autopilot. To guide someone by RT to programm the FMC (flight management computer) to fly a certain pre-programmed route and follow it by an instrument approach and landing (ILS Cat IIIC) is possible. Airport has to be equiped for this aswell though. The person isnt flying the plane, it simply tells the autopilots (yes it must have more autopilots) what to do.
Actually, 3. Normal autopilot operation has 2. If the 2 autopilots parameters are not the same (1 fails), autopilot disengages. For autolanding you need 3 for failsave. Then if one fails, the other 2 override the malfuntional one.
Reading the comments of squeekers who think they have any idea what real flying is like based on an airplane game. Especially a complex high performance airplane.