I recommend disabling all airport and scenery addons, otherwise the flights will probably not work correctly.
I create flights for P3dV4, V5 and V6. Unfortunately not all flights are compatible with each version.
Each mission has the compatible P3d version in front of the download link: P3dV4 | P3dV5 | P3dV6

Since my old gaming PC unexpectedly broke down, I passed the time while waiting for my new PC by playing subLOGIC’s Flight Simulator 2 on the C64.
I then re-flew this exact flight on my new PC using P3D and turned it into a mission.

The flight goes from Los Angeles Intl (KLAX) to Catalina (KAVX) and is flown using VOR navigation.

You can choose between a fair-weather flight with no wind, or a flight with limited visibility, wind, and rain.

You can also choose to enable assistance and decide whether the autopilot is operational or not.

If you'd like to recreate the flight on a C64 or a C64 emulator, you'll find more details about the C64 flight here.