Today I came across the "Anchorage (PANC)" versus "Lake Hood Strip (Z41)" parking positions problem after having landed in PANC with a PMDG T7F planned for Cargo Stand 20 (Parking 20).
This and other threads give proposals mostly for solutions in conjunction with Aerosoft's PANC add on scenery users.
The problem for FSX default scenery users is a different one though, beaucause PANC and Z41 share the original APX08100.bgl.
But Umberto's reminder (in one of the threads) of using the "disable_on_airports = Z41" command inside the "CouatlAddons.ini" (in "C:\Users\username\AppData\Roaming\Virtuali") did work well for me being an "FSX default scenery user"
(so goodbye Z41, but your 670 meters of gravel RWYs were too hard on my brakes and tires anyway
)