New AI line + hints for Spa 1966.
Note that the hints were made especially for the Lotus 49 and the Ferrari 312/67, as they tend to take corners too fast without the hints. For more modern cars these hints might make them too slow (you can try to play around with the ai_hints to tweak them for faster, modern cars of course).
Just unzip and copy the specific track folder to your assettocorsa\content\tracks, it will automatically copy the new ai + hints to the correct folder. Perhaps make sure to keep your old AI files if you don't like the new ones.