This might seem dumb but how do you use those files? I put them in the "cubemaps" folder thinking it would show up in the "maps" section but ... nope. Is there an extra step to have Neo update the list? Or do you need to keep the folder names and paths? (I downloaded individually)
Those cubemaps are for Graphic Plugin (shortcut F5).
All you need to do is place them in the /cubemaps folder.
It's not a "map". It's a skybox. It's used to control the lighting in the scene.
It doesn't matter whether you dump them altogether there or keep the folder structure.
Just note that folder structure also tied to your scene preset. So your scene might need some rework.
I think most ppl just dump them into /cubemaps folder without keeping the folder structure.
Afaik renaming the file name doesn't really affect anything except changing the display order in the plugin window.
Personally I tidied them to separate folder and renamed all of the cubemaps according to the maker name. Just like in that folder.