yes, although I'm not sharp on the details. You have to enter devmod and create an rfmod with just the cars and tracks you wish to use. I did it once a couple of years ago, it wasn't hard, I just don't want to give you incorrect steps. I'm sure someone will pop up who knows more.
I am struggling with this also. I made my own series using mas utility but no matter what I do I cannot have two races with same drivers. If someone have answer for this please help. I don`t think it`s easy to create all the drivers and teams by myself, I just want to create series and have the same drivers on all tracks in the series. but how to do that?
I figured out! I created drivers with original liveries and used original driver names from gt championship. now I start race with zero ai drivers and add them manually before every race so there is space for mistakes. it needs a little work but works as it should and it`s rewarding. for me rf2 is like unbruised diamond, best sim when you give it a proper chance. thanks for all the help guys
btw don`t use the new ui if you create mas files with cars and tracks becose some of them don`t load with the new ui, don`t know why though...