I saw some of the information on here about how to create a custom grand prix, and I followed those steps exactly but it's not working for me. The new one I tried to create doesn't appear in the game, and if I try to edit one of the existing ones, it disappears from within the game. Also, when I opened it up from the exec file, in terminal it says...
"[error ] GrandPrixData: Error while trying to read grandprix file 'grandprix/5_alltracks.grandprix' : Root node has an unexpected name
[error ] GrandPrixManager: Ignoring GP grandprix/5_alltracks.grandprix ( File contents are incomplete or corrupt ) "
If someone could help me, that'd be great!