Just out of curiousity, do you own both copies of the game (being PC and N64)? Just wondering.
As for the hidden passcodes [i.e. name entries (like Calrissian)], I just recently sent an e-mail(s) to both LucasArts and Factor 5 alike in pursuit of such secrets. Jury's still out as to a response of any kind. We'll see.
Free Mumia Abu-Jamal