As I mentioned earlier, I've now got all these Apple Lossless files, finally ripped from those DVDs and ready to integrate with my iTunes library. The hard part is going to be metadata.

I can certainly import the new files into iTunes and remove duplicates with something like the built-in duplicate finder, iDupe or Corral iTunes Dupes, but that's only half of the problem. On many of my MP3 files, I've put a lot of energy into the metadata, including BPM, star ratings, and consistent spellings of band and song names. I haven't been able to find any tools that can do the tag migration that I need. Any suggestions? Hack one of the above dupe tools?