Also, i unzipped the files and tried to import the cue files of each game but i got en error message (second printed screen).

I would suggest for Neo Geo CD to use either stand alone Mame or the FBNeo core in Retroarch.

There are guides and thread discussions here on the forums for it.

Mame is already configured in LB for my arcade games and NGCD.

If they dont run in just MAME they will never run from Launchbox either.

Mame Neogeo .207 Chd How To Get This

For the benefit of people who break their heads on how to get this to work.

There is no replacement for a written material and some of the LB video guides are outdated and it can be difficult to find out for an answer from only using the search and many times the answer does not exist.

I dont even use RA for MAME at all so you know more about the topic than I do at this point.

Mame Neogeo .207 Chd Free Im Sure

If you want to write the guides then feel free Im sure the users would appreciate it.

The moderators are all volunteers here so I doubt you will see people lining up to undertake that task.