I had no luck with the DOS version so I upgraded to the Windows version and so far I've been able to tune the car with my XP machine. The more windows you open, the slower the response in each window. Dashboard is too small to view while driving. I think the package needs a lot of revisions but its a good start.
86 GN, T-Tops, ported/polished heads, hydraulic roller, stretch IC, TE45, 55# inj., a whole bunch of chassis stiffening, 13.5" brakes all around.