Make sure to first have SuperBLT, BeardLip and Menu Backgrounds mod installed. Click the link in the dependency list.

Optional video tutorial for installing SuperBLT, BeardLib, and mod_overrides mods: https://youtu.be/rin_sjSJIkg

1. Download and install SuperBLT (tutorial above)
2. Download and install BeardLib (it is dependence by Menu Backgrounds)
3. Download and extract Menu Backgrounds mod to the mods folder and make sure the mod working.
4. Download this mod HoloMyth (Feat. Amelia Watson) Menu Backgrounds and extract folder "HoloMyth, feat;Amelia Watson" to \mods\Menu Backgrounds\Assets, Quick tutorial for multipart extraction and installation
5. Ingame, go to the Menu Backgrounds mod option then in the Background Set choose "HoloMyth feat;Amelia Watson"