"The last step is to add the newly created collection to the main menu by editing RetroFE/collections/Main/menu.xml, and add a line:" I think this one is gone and we use only menu.txt instead
Correct, older versions used an xml.
the retroFE shortcut in the root directory can no tbe moved otherwise it s not working, maybe a quick explanation would be necessary.
The shortcut uses relative paths so if you move the shortcut the exe will not be found. You can create a new one in Windows by right clicking the exe and that will use absolute paths so you can move it wherever you'd like.
when the favorite list is selected, is there an information on the screen telling you it is active or not ? That would be handy.
That depends on the layout, if the layout utilizes the playlist type for an element it will show. The Nox layout for example will display an image for the playlist using the logos in the collections/_common\medium_artwork\playlist directory.
if you want to add layouts and that you have selected the AEON NOX. spare layouts must be placed in Aeon Nox sub folders ?
I'm not exactly sure what you're asking here but if you want to use a different layout you'll need to download the layout and place it in the RetroFE/layouts folder. You would then edit the "layout" value in the RetroFE/settings.conf to the name of the layout folder.