Hello everyone, I haven't been active lately. Yes, I would love to adjust AI for every track, but with the encrypted files the work is impossible. I know milestone uses autodesk softwares, I use Maya myself, but I need to put my hands on the original files. If only Milestone made a full moddable game...but they never did and never will do.
Anyway all I know is that AI follow a spline, a line on the track. In the files of each track you can find the coordinates of the spline, however it's impossible to edit them properly.
I don't think you can do much more editing with the AI than what I did, but if someone manages to, congrats!