Newbie question - Adding Album covers

MP3TAG Newbie here:

I have artwork embedded or in folders for most of my flac tracks. The tracks are in separate Windows folders for each album but the album front covers are is missing.

As each track has artwork (of the artist) but not that of the album, is it possible for me to keep the track artwork (for each track) but to add the correct artwork for each album?

I have Mp3tag, PerfectTunes, dbpoweramp and Foobar2000

The actions and the manual import of pictures allow it to keep the already existing pictures.
It is also possible to specify the context of the picture.
See http://help.mp3tag.de/options_format.html#importcover for the action.

Danke