Yes, I’d update the first post with the new way to load the games, but it looks like editing is locked for some reason (not sure why, maybe mods can enable editing?)
At any rate, if you update to the latest FBNeo core, and you update the Retroarch info files, then you can load Neo Geo CD games the ‘normal’ way if the games are located in a folder named ‘neocd’ (and the new core option ‘Load Subsystem from Parent Folder’ enabled, which is enabled by default). Example
...path_to_retroarch_game_directory/neocd (folder)
League Bowling.cue (CUE file)
League Bowling.bin (BIN file)
Then you can simply load the cue file in Retroarch using the ‘Load Content’ method. This should also now work with playlists, and Rocketlauncher, etc.
or you can load the game directly from the command line without the subsystem argument:
(Windows Command)
"...\path_to_program\retroarch.exe" -L "...\path_to_cores\cores\fbneo_libretro.dll" "...\path_to_retroarch_game_directory\neocd\League Bowling.cue"
This same method should work for all subsystems that FBNeo supports.