I have 2007 carset and drivers in use myself, but for some reason I didn't use mainsfondo.raw from the menu graphics archive, can't remember the reason...

As they can't be selected in the game, maybe it is better to leave with original data and let user install them if he wants? Or use updated carset and driver, but don't install menu graphics... or have all options as separate directories so that user can rename directories to get other sets in use.