Yeah so You need Umod for this
1. download Umod
2.Search YT for adding rocket league to Umod and enable Global Hook
3.Open RL once u added RL to Umod
4. go to Umod while running Rocket League and unrar the file and select all 3 files and drag them into the big white space area
5. DONE!!
this is my first ever modÂ