Well that sounds about the right structure.
I'm not sure what you are asking
I think you want to know what will be displayed?
If you want the rotating cdart you will have to put that inside the album folder. If that album has multiple CD's use two subfolders inside the albumfolder. Something like CD1 CD2
For artist fanart you should create an 'extrafanart' folder inside the artist folder and put all fanart there (any filename is good).
Next what you need to do is in Aeon Nox set 'path to music library' and point that to the master folder where all you artist folders are and it should work.
There is currently no support for 'album fanart'. It will only display images from the 'extrafanart folder'.
To automate the cdart/fanart downloading you can use CDart Manager. Set the paths in the settings the same as in Nox to you master folder where your artist folders are.
If you are not sure just set it in a test folder or something and point Nox to that same folder. This way if it goes wrong it won't screw your music folders.
So far i have had no problems at all using this.
Small note:
Almost all other skins handle the artwork for movies/music the same way. So if it work in one it should work in the other. Given that have the correct settings.