First I would like to mention that I have gone to the "associated platforms" tab and selected "Arcade" games to use the fbneo_libretro core.
So, I have a handful of non merged roms meant to be run using FB Neo 1.0.0.3. They run great when launched directly from RetroArch using FinalBurn Neo. However, I cannot get them to run by launching them through Launchbox. As I mentioned, I selected "Arcade" platform games to run using the fbneo_libretro core on the "associated platforms" tab. I have also double checked that the games are actually under the "Arcade" platform. When launched through Launchbox, some version of FB Neo does launch, but I get a grey error screen stating "Romset is unknown".
Some Pictures:
https://imgur.io/a/kcUOuCx
https://imgur.io/a/BLG558X
Any help or ideas would be greatly appreciated. Thanks!