I did pretty much the same thing Yakumo states, only I used MP3Tag, which is pretty much the same thing, and it too can embed the image on the MP3 file. Good combo, indeed, and it did what I was intending for it to do.
I like the way Tag&Rename allows you to remove certain aspects of a MP3 ID Tag from all MP3s with the press of one button. I hate the automatic Album generated section of tags. they normally list some greatest hits or compilation album rather than the original album source (if there is one) so I deleted all album tags (over 1000) in less than a minute.