Hi
don't really answering you question sorry for that but to import right names in mame like roms instead of writing each name manually (which I did before) I used to select every games in a platform (like sega naomi) then right click, edit, change platform name to Arcade en press ok
all games should appear now in a new platform name "Arcade" then select all the games again in tools menu select download metadata. LB will take the games name (which are mame named roms) and try to get the right name and download snaps, pictures, covers if available.
Then you juste have to change the platform again back to Sega Naomi, and all your game will have their right names and somes get pictures (cf example of my collection)
Good to know before doing this
- The arcade platform must not exist before changing the platform for naomi game, if it exists it will mess up sega naomi and others arcade games
- after changing the platform to Arcade I used to go to tools - manage platforms - Edit Arcade platform - directory tab end their I change all directory to be the right naomi ones (eg : video directory change from Videos\Arcade to Video\Sega Naomi). Doing this is usefull to get the pictures/videos and other things to the sega naomi folders when I download metadata, If didn't do this when you go back to sega naomi platform, donwloaded content stay il the arcade/mame folders.
Sorry for my english and hope it helps and clear (the whole process for all my arcade like roms took about one or two hours to change platform, download, rechange platform (naomi, naomi2, irem, pgm, hikaru, CPS...)