Good day, Billy. I have poured over this post for days, with no success. First I followed your steps to add my own bezels to MAME in RetroPie. I created all the .cfg files and tested it out with no luck. I researched the web some more for a different method, but I keep coming back here. I downloaded your kit and placed everything where it should go. Still, I never get a hint of a bezel overlay.
I’m running the current stable RetroPie image, and I’m using mame4all as my MAME emulator. I made sure that your file names mirror that of the rom I’m checking, and I made sure my permissions were correct.
I’m sure there is a setting in the main retroarch cfg file that I’m missing, but I can’t for the life of me figure it out.