I haven't been able to get it to work in GP3 2000 either..
I've imported all the jam files into their respective sub-folders (in the GP3 2000 folder), I've imported the 16suzuka2003.dat file into the "circuits" folder, I've enabled the debug option, I've selected the track in the GpxTrack section of GPxPatch, AND I've installed GPxPatch 3.71 in the GP3-2000 folder...every time I try to load up GP3-2000, it keeps prompting for the CD, then crashes to the desktop.
Am I doing something wrong here? I think I've got everything setup as it should..
Is there anyway to reduce the size of the dat file so the track is compatible with GP3? If you can do that, the same way you've been able to do it with Sakhir, Melbourne, Magny Cours and Interlagos, your actions will be GREATLY appreciated, by me and others!