Hacking Need help utilizing CPS1, CPS2 and NeoGeo roms in Retroarch library

[GGorast]

I managed to scan my SNES, NES and SEGA folders. Game scrapper finds the games and put them with nice icon at the top, BUT I have been struggling with MAME/ARCADE roms. I simply cannot understand why from 150 zip files it only recognise 2-3 and they are separated in different categories. Can someone point me on how this exactly works? The file is fine, it can be played if its loaded directly from Load Content but the scraper simply dont add it to library.
Any help will be appreciated.
tnx,
S@