[hakko504]

1. No, if you have FILM content then it is always encoded with 23.976fps.
2. Use the GKnot deinterlacer, that is a better deinterlacer as well as you can play around with different deinterlacers as well.
3. Two differences, 1) framerate: FILM = 23.976fps, NTSC = 29.97fps
   2) FILM is always progressive frames. NTSC can be both progressive and interlaced, though it is far more common with interlaced frames.
4. 'fraid not, but you can use the ParseD2V application by neuron2 to get a better idea of what is happening inside the vob.