The example given does require a bit of retroarch knowledge. I didn't make it more specific because the Bezel app is used for more than just LaunchBox. As far as LaunchBox configuration using the latest Bezel app referred to in your post, you would use Tools/Manage Emulators, then select Retroarch and click on the Edit button. Find the Associated Platforms section, then the list of cores and "Extra command-line parameters. In that parameters section, use the -c option and the name of the cfg file created when the app installed the selected bezels. Look in the root Retroarch directory for a list of the cfg files available. Hope this helps. If not, give us a list of the cfg files available and a pic of the Associated Platforms panel.