The MP3 Media Studio is really great! At last I managed to clean up all my mp3 data using it!
In the case of the cover art I had to use an external program to get satisfying cover arts as Folder.jpg files and then add them to the mp3 files folder by folder using the studio.
What I would love to see in the studio is:
1) Generate a Folder.jpg file in every folder with mp3 files
2) Select a cover art from a number of recommendations during this process
3) Fill the cover art mp3 tags of the mp3 files in the folder from the Folder.jpg files
I think the 3 point could be easily implemented and would fit perfectly into the wonderful automation functions of the studio.