Encapsulated picture support has been available in ID3v2 for many years. I have spent 100's of hours properly tagging a library of 4500 albums. Audio Tagging is described in the Swift documentation and I was led to believe that ID3v2 was supported when tag data exceeded the capasity of ID3v1.
I can afford having spent a few dollars on a software I'm not likely to use anymore, but I'm mad having wasted my time on it. 