You need to have the game data to run the game.
Which begs the next question, how do you get the game data, though the
main install disc I take it?
When I originally found the dxx-rebirth project I got the data from a torrent since that was all I could find. I later found Descent and Descent II on gog.com so I bought it there. They were removed from gog.com a short time later
and I don't know if it has or will return there or not.
I beleive the dxx-rebirth software will work with the Descent shareware and Decent II demo data as well and IIRC that is available at the dxx-rebirth.com website.
There is a new game along the lines of descent, a continuation I think by the original developers (I am not certain of that). Last I looked it was just starting up. I haven't yet but I have meant to look that up and see what is up there today. I forget at the moment what it was called but a search will likely
turn it up. It did look interesting to me.
--- BBBS/Li6 v4.10 Toy-4
* Origin: The Rusty MailBox - Penticton, BC Canada (1:153/757)