SOLUTION: Remove client side hosting options, force an update with some nice content that makes people WANT to play the new version, but they can't because no more crack servers available. Make it so servers can only be hosted/ rented by/from Live For Speed.
YES it sucks for those hosting their own dedicated servers legitimately, but you get rid of the crackers. LFS can host servers to admins at a nominal price, and I feel it benefits everyone. Maybe it cost more in the end, but at least there will be people using our servers.. food for thought, and I know folks who work hard on their servers won't like this, but it is one realistic way to fix the cracking problem.