never mind, i finally found a full romset that works.

tons of info, but I just want someone with working NeoGeo/FBA to PM me so I can ask couple of questions please. Mainly how in the world were you able to find the right neogeo.zip bios file?? Ive tried about 8 and can't get MetalSlug to play on any of them. I had a working setup on retropi, but can't remember where i got the files from. now I've converted over to recalbox and have had no luck whatsoever. Thanks in advance!