I have been searching the Internet high and dry for an IDF file for the BK9 for years, I too don't believe one exists...

The problem I found with using song makeup tools to modify parts of a song is that it doesn't reflect back to the actual midi file... so each time you go back to the midi file to edit something or record some new data - all your song makeup edits are reset. And you have to start all over again. Unless I have missed something or there is a better way to do it?