I actually made a scenario a while back, you will have to have my level extracted. Take the scenario zip and extract it onto the level where the .mis file is, merge everything and overwrite. let me know if it works, also it has a custom song that plays. The song was royalty free music, and I don't know how I feel about it. You can adjust the song volume with the music slider in audio options. If someone finds better royalty free racing music let me know.