I assume you mean that there are no working airfields on this mod map, and that the vehicle you want to land is a plane, right?
This is problematic.
Find a smooth surface (a non-working airfield for example), steer the plane towards it on low speed. Get it close to ground using flyInHeight command. When the plane is gliding slowly over the runway you set the fuel level of the plane to zero.
I know this sounds stupid, but if your airplane is a slow one (like the cessna) it might actually work and not result in a crash-and-burn. I tried it myself when I was trying to create an emergency landing in a cutscene. But you need to fiddle a bit (a lot actually) with the speed and altitude of the plane.
To make it start again, you just need to set the fuel level back to number greater than zero.
Good Luck