Is there more things to edit about AI than just grip and car power. I remember that in gp2 David Brabham and Jos Verstappen were difficult to pass and were crash prone... ...is there a parameter to edit that behaviour (in gp3 i mean, not interested in gp2 anymore)
driver ability-using GP3 Edit. and also driver consistency (using teh range thing). Can have seperate Qualli and Race abilities (so Trulli would have a higher qualli ability than race ability for example)
is the range parameter race based or lap based. eg. a less consistant driver drives one race good and than the next bad in ch.mod, or is it that in the same race he can make some good and some bad laps.
Two more things. Advanced physics editor can tune the characteristics of the AI cars as a group as well as the driver car. Then you can edit the track Magic Data to give a lot more variation to each race. These are more general tools but used in combination with the bits available in GP3Edit, you can get some quite realistic results. It won't give you Ralf, who only ever let MS pass easily or (going back a bit) Jordans that are far better in the rain.