The Emperor's Hammer has a huuuge amount of information relating to this game, so scour their page first, probably. This was their mainstay game for a long time. There are other sites on the internet for this too, though. -Licah Fox
TC for XWA
There is an ongoing project, to convert Tie Fighter to the XWA engine. A total conversion if you will. Alot of the work is done and a playable "beta" is already out. Some of the tie missions are missiong, and others need to be rebalanced for the XWA engine. More info available at TFTC.
~ Joshua Hawkins