For best results,
  use a tripod
  focus on infinity
  use normal 200 speed film
  expose 1-10 minutes
  use a small aperture setting 

The image will capture bright 
objects (lights) and dimly lit 
objects that are stationary 
throughout the exposure. Use 
a flash to highlight objects 
that would not appear.

Hopefully you can figure out a 
trick to keep the shutter open 
without holding it. We used 
the shutter lock switch (which 
normally prevents accidental 
pictures). 
  Set the exposure time to 'B' 
  Cover the lens
  Press the shutter and lock 
  Uncover the lens 
  (without moving the camera)
  Wait
  Cover the lens
  Unlock the shutter

Taking 3D pictures is easy. Just shoot one picture, 
then step one or more feet to the side and take the 
same picture. Seeing 3D pictures is the tricky 
part. I think it is a good deal easier than seeing 
those images hidden in the headache-causing dot
posters. You have to cross your eyes, so the two
images become superimposed. Getting this while
retaining focus is a matter of practice.