F1 2013 Classic and new cars in one race?

F1 2013 The Game (Codemasters)


from my limited knowledge, you must rename every 1977 ferrari file in the cars folder, to the 2013 ferrari, it takes forever, but does work eventually. the car will be unbelievably slow though compared to the 2013 cars
I tried this method in the last year but it did`nt work.The car power can be editied so the speed were are the same.In my field the cars are all edited.I have non-turbos, turbos and turbo diesel (i edited some points in the ctf editor, so it will be more realistic e.g. mass , turbo delay , and some other points).I really have much more fun with this concepts.