Script to import music review files into comments field

Can anyone give me a pointer on how to write a script to take my AMGreview.txt files (in my folder directory) and import that text into each song's comment field?

I bought software (Ivolume) which replaces Itune's volume normalization with Replaygain algorithm. UNFORTUNATELY, this software also corrupted all of my comment fields-- in 80,000 songs!!

I'm trying to automatically restore all of my album reviews which are saved in all of my album's directories.

It would take me hundreds of hours to do this manually--

Help?!
Thanks
Starmanj

Make a new action

Use the action type "Import text file"
Field: COMMENT
Filename: AMGreview.txt