Here's a quote from this link:
http://www.yamahapkowner.com/forum/index.php?topic=15384.0


"The Intro's and endings etc have been changed in many cases also and so this is where the bulk of effort went into. There is also a Piano 'Octave' button [by the modulation wheel] so that you can now play the lower octave Piano Bass notes. The Organ 'Leslie' is operated by the mod wheel also in Drawbar mode- sweet!"

Does that address the issue?

John