I've been using this program for about 2 years now and I love it.
It is a windows shell extension that can do ANYTHING with ID3v1 and ID3v2 tags.
Al you have to do is right click an MP3 or a folder containing MP3's, go to properties, MP3-Info, and then you can then do a number of things with the tags.
Just thought I would tell you guys about it.
Check it out for yourself!