NeoRAGEx does not use the complex CHD format often found in MAME. Instead, it requires standard .zip files. However, it is picky about the filenames inside those zips.
file containing the Neo-Geo BIOS in your ROMs folder for any game to load. Folder Structure neoragex 54 all games roms verified
For a complete, automated set, many users look toward community-curated collections on the Internet Archive NeoRAGEx does not use the complex CHD format