However, since the hog extractor I originally wrote for Descent Maximum seemed to work with the original Descent for PSX too, I've commented it up and included the source (it's fairly trivial)...
http://home.comcast.net/~jeff250/descen ... um/eph.zip
(The Descent Maximum to D2 Conversion can be found here.)
Also, below are the introduction and ending movies to the original Descent for PSX. They're very analogous to the D1 plot, except, well, they're movies.

http://home.comcast.net/~jeff250/descent/psx/intro.avi
http://home.comcast.net/~jeff250/descent/psx/end.avi