Hello,
You can change the track order by renaming the F1CT**.DAT files.
This changes the track that is loaded when you start a session.
However, this doesn't change the info screen for each track. You will still get the info screen for the original track.
Changing this would likely require making some changes to the gp.exe.
But if you simply want to play the championship with the tracks in a different order, renaming the files would be sufficient.
Cheers