Also I’ll be modifying lots of folders to use the color scheme, will they end user get notified that it’s a system folder every time they rename or delete a folder?

The folder has to have either or both the read-only and system attribute set. cmd prompt>attrib +r +s name_of_folder

I have got a lot data retrieved from a harddisk recovery recently, then all my folders present in those given drives, have all their attributes files (desktop.ini) with them, but now they show up as ordinary, dead files without system attributes, and doesn´t give all my folders their icons they use to have, even though all the data is stored.
How can make all these desktop.ini files (and others, mentioned further below) regain their system attributes and show the icons again while the .ini files go hide again.

I also have a lot of thumbs.db and some AlbumArtSmall.jpg, AlbumArtSmall_{longdigit}.jpg-files (cover images for ripped CD albums).

It'd just be such a tedious process and waste of time to manually re-make all those attributes from the start, when I do have all these files, I could hopefully use.

Sorry, the custom icon is never used on desktop shares. Is there a reg-key to change this?