...how do add ai to track on the host having the server deal with the computing load rather than the client, and is it possible to allow more than three cars?

The dedi doesnt have support for running AI. You'll need to use a fat client running as a server to do that.

Thanks, I assume the cap of three AI is to do with network usage???

It would be nice in the future(if the AI reached an acceptable level of driving)to have a dozen or so AI alongside the real drivers on servers to get the numbers up and the ball rolling

Hi,

You can set in a dedi server how many cars per guest are allowed.

// max cars (real+ai) per guest pc
/carsguest=1

Default is this 1 , so on the most dedi's its not allowed to drive and add a AI.