If you don't have any other character mod, just copy the files inside the folders into your SD card (except for the "Separated Files" folder).

If you already have other character mods in your Driver.szs, Award.szs, Race.szs, etc. Open those files and replace the respective .brres files with the ones included in the "Separated Files" folder. Ignore the files inside the Menus & Scenes folder (except for lj-allkart and lg-allkart_BT).