Hello. Can anyone advise whether or not you can add additional Rhythm accompaniments to the PX-560?  For example, downloading from a third party source to a flash drive and plugging it into the PX-560.  With Yamaha PSR's you can download style files to a flash drive then plug it into the keyboard and choose the file and play.  If it is possible, can anyone explain how this is achieved on the PX-560...ie. tutorials..etc.   Thank you.