You know, you could make the FID tag part of, but not all of, the file name. For ease of reference as you're messing with the files.

For instance, the file could be named:

"FD3L REM- It's the End of the World As We Know It"

Seems to me that Emphatic could find the file just as easily that way, as if it were just named "FD3L".

This sounds like a great way to assist people in debugging the way the lyric tags work (like the problem with the Simon and Garfunkel song reported earlier) because there'd be less re-uploading when there's trial and error involved.