Let me start off by saying how much i like this program! It works great and has helped me through a lot of nasty renaming issues.
I have a feature i would like to suggest though.
It would be really nice if there would be a possiblity to add the name of the subdirectory a .mp3 file is in to the IDTAG to the spot of your liking. (something like a %folder% or %subdirectory% parameter would be very nice).
The reason i would like this is, that i work with a lot of PC's and other devices that fully support the .M3U playlist format.
The most used program to support this format for me is winamp however, which can not show the subdirectory in the playlist.
Adding the subdirectory (or the final 2) directories to the IDTAG in the Artist field for example (next to the artist name) would be very convenient to keep a well organised playlist.
The subdirectory or the final 2 subdirectories, files are in are usually the album name and sometimes even albumname/cd#/.
It would be a very practical feature i think.