I mean a custom game list. So I have my main Arcard game list that is associated with Mame in GameEx. I can update that list from the menu and LEDBlinky works fine there.
The I have my custom lists, one that only has 10 games/roms listed called "Top Ten." Then I have another for my daughter's games that maybe has 8-12 games listed. I have those list show up in the GameEx Arcade main list.
Arcade - Is my default Mame list
Top Ten, Alli, Japaense imports, etc are all additional custom lists and they do not see to pull in whatever control scheme LEDBlinky pulls in for Mame, I think.