Apparently this sound-set is only available for the Pa4x at this time. Qui has done some real smart and creative programming. I like the Pa4x factory sounds to begin with but this pack adds a whole new dimension to it. Highly recommended!

Here's the download link:

http://www.quirobinez.nl/korg-pa4x-sounds/

and these are two short demos of a few sounds that I've played so far.