In a nutshell, autower is an add-on to Flight Simulator 2004 that will automatically set the tower position to the closest airport.
Abstract:
Have you ever been annoyed by the fact that when you want to see this perfect
touchdown you just made from an outside perspective, the tower is anywhere
but where it should be? Got frustrated trying to get the tower where
you think it is in reality, or at least somewhere where it fits well?
If the answer is yes, then take a look at autower. Designed to operate in
the background without any user intervention, it automatically moves the tower
to the airport where you want it to be, to the spot where the tower sits in
reality (well, at least somewhere close).
Autower requires FSUIPC. If you're using FSUIPC 3.71 or newer, then an unregistered version will do. For FSUIPC 3.70 or older, you will need a registered version.