Karaoke Forums

I'm hoping someone can suggest a way to remove vocals from a CD. I've heard there is software available, but how effective is it? And is there some other ways to go about removing vocals?

Frequently, I want to sing songs that are not available from Music Minus One or Cantalopera (the only two labels that I know of that specialize in Classical). Currenlty, I must rely on someone recording a separate background (usually for a fee). Does anyone know of any other manufacturers of Classical CD+G's (or at least regular CDs with only accompaniment)?

Any help would be greatly appreciated.