I've gone back to a clean install of the game, and have only installed graphical mods (cameras, tyres etc) - and even with tyre sim on, I'm still able to be competitive with the AI. While a lot of that is probably down to the 'slow corner fix' not being installed, it is making the game competitive, but fair (for my own personal level). So, what I need to know is what files do I need (or which parts of AI mods) to just make the AI more fallible (make mistakes etc) and DNF from mechanical failures? I might run without the slow corner fix for a while and see if I enjoy the game more, for that what it is all about in the end. mod edit: posts merged - if you are the author of the previous post, please edit and update it instead of starting a new post. JC. Just to make myself clear - I'm looking to find out which file in the AI folder does what - for example, the AI choreography file has something to do with mistakes as far as I know. Edit: OK - update. I installed the slow corner fix only - no other AI mods. Result? The AI are going round corners more quickly now, but I can still keep up with them. Even with my tyres wearing out, they weren't disappearing as fast as before - maybe tyre sim does work after all, either that, or one of the mods does something to their straight line speed; before, similar cars to mine were shooting past me on a straight, now it's only happening with cars that are actually faster. Before, my team mate once past me was doing a disappearing act, the engineer would say he's going a second a lap faster than me!! Now, the gap was either closing, or opening only slightly - confirmed by the engineer saying that he's a few tenths faster - probably because the git was on fresher tyres - my tyres were a sight at that point!! So, all I need is the bit of an AI mod that makes them spin occasionally - the extra damage mod should do the rest, and the bit of an AI mod that causes them to have mechanical failures and then I've got a great F1 game. Also, did a 100% race with no crashes - however I took a break just before the 75% stage - the time it usually crashes. Maybe that's the key to it, or maybe getting Steam to validate the files as suggested by this post: http://community.codemasters.com/fo...-under-win-7-usually-75-race.html#post6792933 did the trick. This has found the right balance for me, going by that first race, maybe it'll help others as well. So, to clarify the only AI based mod I installed was the slow corner fix - no other AI mods at all.