Thank you Kenneth for your reply. I already selected formula classic in the main menu like you suggest, unfortunatly that is not a solution to the problem. The formula classic cars won't show up. For example if I would start a championship, i can't create one, it gives the message I need to load/select a car, which the game can not find.
If I try to test it will still only suggest the V8 cars, the game do not seem to be able to "see" the Formula Classic catagory/cars/teams when selecting a car to drive.
I used the download from this site, and installed it. I will try to install it again, not expecting it will make a chance.
If you have any more suggestions that would be great!
About the Esso and GY car, to me it's not a problem if it will not work because it's only a paint job, but the Formula Classic I would love it to work.
Thanks!