GPL: Ajusting AI in 69 mod possible?

I used to use AItweak to get all the cars running around the same
speed (mine) and can't for the life of me figure out how to adjust AI
using GEM+. It seems to start out at .50 and goes up from there, i'm
"guessing" 0 is default but find no good documentation spelling it out
for me. Is there a line in the track's ini file (created by GEM+) to
do custom settings for each track? Is there a way to get AItweak to
work with the 69 mod? REALLY liked the way it worked..

Thanks
Gary