Why not just re-record the style part and replace the original with the new one exactly as needed....all the tools are in the KB to do this.

Secondly why do people want to always shy away, associate yourself, or being proud of from what an arranger keyboard is supposed to do? ......."Sound Like a full band BY Yourself"
You only fooling yourself if you think otherwise or that the audience doesn't know what you doing.b the mere fact alone that you are pressing keys to create sounds other then a piano, organ, etc is more then enough evidence to anyone listening or watching that it's all automated in some way.