HVC001

> I don't know if we'll ever get a firmware update to fix that, but 97.5% of the roms in the Nt Mini packs' SMS directories have an `.sms` or...

+1 for this. Alternatively, is there any reason for us not to just move everything into the main MiSTer pack and do away with the add-ons?

Yes, agreed. #854 should resolve this.