I'm trying to use my own perk shaders and the only ones that work are the original 4. I put the iwi files into an 'images' folder in the map folder for town 23. The BO perks and named vending_deadshot_shader, vending_phd_shader, vending_mule_kick_shader, vending_staminup_shader, and I added one for Dr Dagger, vending_drd_shader. None of the BO or Dr Dagger shaders work.  How can I fix this?

in your launcher, then go to mod builder and in mod.csv put in. then that will fix it
material,vending_staminup_shader
material,vending_deadshot_shader
material,vending_mule_kick_shader
material,vending_drd_shader