Preparing and hanging doors is a tricky business. To get a real aged look you have to create wear and tear.
Lightly sand the surface and then smudge it very lightly with grey chalk pastel. Be sure to smudge only where ordinary wear and tear would be, such as around the door handle.
To add more realism I made a faux door catch by cutting an indent on one door (above) and gluing a small brass square on the other (below).
I hung the door using hinges rather than using a pin (which is easier).
This required carefully cutting in where the hinges will go.
I superglued the hinges on, and then drilled little holes for the nails. This makes it much easier than trying to nail it when it is not fixed in place. Also, be sure to drill the holes and glue in the nails rather than nailing them in with a hammer. If you nail them in the chances are the delicate wood of your door will split.
It is important to ensure your hinges are perfectly lined up and horizontal, otherwise the door will not open or the hinges will break when you open it.
The result is pleasing.