I have recently purchased AMS 2 and have come across this resource. For myself, I bought the game with the intention of racing 'custom championships' with one other friend and a pack of AI. Whilst we will likely do that and configure it to our liking, I think I am going to suggest to him we use this 'career mode' as our base.
What a fantastic tool - really well put together and just the sort of thing communities should be looking for. I would unreservedly recommend this, having downloaded it and had a click around.