It requires the X2 to have the Fast IO card and you need 2 universal fast io boards connected to it for the control panels since its a 4 player game. Also, you have to find a way to flip the right screens image as its been flipped to be used with the mirror in the cab. I forget if it uses the the 7900 or 9800 video card.
I hope whomever is bidding on that knows what they are getting into and they have the skills to get it working cause the game just wont work without its supporting hardware. I know first hand because I had to buy the entire parts from an actual cab (minus the cab of course) wire everything up to get the game working, then I had to flip the right screens image with an addon image processor/hardware as there was to way to do it in software.
Yeah it just needs a lot of parts/stuff tweaked on it to get it working. Which is I guess why you havent seen a working public release of the game. I hope they do figure it out one day and release it to the public, its an awesome game.