No difference, but prepend to right is only enabled when you have both columns selected, have you only selected fields in one column ?
Ah ha! After selecting both columns, it works. Thanks very much. Now the problem is that the license will only let me save changes to 50 files at a time. I can't convince my boss that it's worth $20 so I'm stuck doing this over and over for 11,000 mp3s. Either that or I learn enough perl to whip something up with a cpan id3 module.
Any way you would sell me a special license for one day?