Is there a reason you cannot use the CDDB Gracenote database? I've had luck using it for songs I imported from various sources.
Keep in mind that you can change the tags on large groups of songs if you have to do it manually. Select the group of songs you want and go to "Get Info" under the "File menu."
Good luck
Keep in mind that you can change the tags on large groups of songs if you have to do it manually. Select the group of songs you want and go to "Get Info" under the "File menu."
Good luck