Hello. the files seem to still be available from the schallerf1 link above.
Like Zeppelin said, this is definelty a beta. The track profiler option in the new 3DEditor is helping smooth out all the bad bumpiness of the track.
The CTD's you are experienceing have nothing to do with the extra files being present. Even the corrupt bin file does not seem to effect it that much to tell you the truth. If I build good bin file, it uncovers a horrifying problem of a enormous face that extends to the sky and cuts the track in half. you wind up driving through this white wall at a couple places on the track. I hve no ides how to eliminate this and it may require a complete remake of the track and that is not something that will happen in the near future.
Take the wad and the .dat file and hack it up to your hearts content. If you ever come across a solution to any of its problems, please post them somewhere and I will be happy to incorporate th fix. I have make a whole new solid ground surface area that will go around the track and I am busy trying to lay that out. It is looking that I will be remaking the entire track. Not redefining the .dat, that is allready complete and running smoothly, but I fear the entire graphics set needs to be reintroduced to get rid of the enormous face problem that is really a complete show stopper.
It will be a while before a new release.
But rest assured, I plan on working on it all the way up thte 2006 race and it will be ready for everyone to do laps by then.
Thanks
Schaller