Thanks for the speedy reply dziugo. On the other hand - DAMN. I was actually hoping it would be possible to ADD new movies in using those blank slots which could then be called in the field script, but as your tables seem to suggest, there in fact are not spare slots...
I SUPPOSE one could take advantage of the disk swapping to use an ID not used on a particular disk and somehow make a copy of that disk with a new movie on it that uses the same filename as would be on the previous disk?
Not that the idea is worth doing, I'm only talking hypothetically.
Now I gotta go listen to some Hawthorne Heights and slit my wrists out of depression. Haha.
EDIT -
And this is why you don't try to come up with ideas when you are sleep deprived. Obviously if I want to include a couple new movies I merely name them "fship2n.avi" and "moriya.avi"... That took me all of 5 seconds to figure out after I got some sleep.