I know the basics of creating a custom championship gdb. What I'm having difficulty with is having certain cars only appearing at particular tracks during the season. I know there was a tutorial about it authored by Totenkopf at NoGripRacing, but that was about 10 years ago and, alas, NoGrip is no longer around. Also about 3 computers ago and some files got lost. I know that the AI Vehicle Filter line has to be edited in both the track's and championship's gdb's, and the Class line has to be edited in the .car file. Just not sure of how those entries should appear in the respective gdb and car files. That is, do I enter the name of the tracks' gdb as you would when creating the Scene Order, or just any form of the tracks name (SEBR = Sebring for example)? Any help would be greatly appreciated.