Use Cinnamon to paint the letter of choice on the front of the pumpkin.
When the paint is dry, apply a small amount of Antiquing Wax and wipe on the pumpkin. Buff the wax when it is dry.
Cut the stem of the pumpkin out to fit the doorknob. Be careful not to cut too much out. Cut a circle of burlap. Cut a small hole in the center for the door knob. Hot glue the burlap to the top of the pumpkin and repeat with the doorknob.