If you scroll down to the comments, there is a borders hmod. It has all of the console borders and all of the handheld borders in it. When you go to overlays in RetroArch and select borders, don't choose PNG files. Choose cfg files that connect to them. And pick the ones you like.
Yes I downloaded it and looked around in the folder, saw exactly what you mean with the 2 files types, cfg for sure.
My real question is about getting one of the retro tv overlays on my nes classic, The system ones are ok but I'd like the retro tv for everything I have on there. I assume someone would have to make a custom hmod with the appropriate cfg overlay file in it?
anyone feel like doing that?