Don't bother - I have a SX900 - buy a tyros 5 used if you can much better keyboard. I know you watch the demos of the Genos and is a must have , but it's amazing what you can get out of the older keyboard with a little more work. heck I did this on a prs s900 and still have a problem getting the right sound..
https://www.youtube.com/watch?v=jhGY-cWtoTA
And would the genos really make this song that much better? There is only so many keys and so many sounds....