@SeeNoWeevil Yeah, arcade roms are a headache and you are correct, you have extracted roms, but don’t know what version of MAME they are for. It’s just as bad as finding a random arcade rom on the internet and hoping it works.
But there is good news, most neo geo roms have not been changed in years as they were ripped very well early on. So your best bet is try to run them on Finalburn neo and see if they work. If not, try MAME 2003. You will also need a neogeo bios file put into the bios folder. Which is just as illegal as downloading a rom. Or if you're lucky, the makers of these machines and gog may have put it into each rom or have a copy somewhere that you can extract it.