Your opinions on importing Vocal tracks too...

[songpony]

I chose to go ahead and import them - it's sometimes nice to use for filler where people can still see and follow along with the words (as opposed to just using a non-karaoke song). If they're in the songs database, they'll obviously still get extracted to the book files, however you can preface the song titles and artists with some funky character (or characters) so they all get grouped together so you can easily edit them out of the files before you print them. Just an option...