That's the beauty of using Style Creator, the built in program Yamaha uses in all it's arranger keyboards. Once you learn how to use it, which requires a fair amount of time, you will be absolutely astounded as to how easy it is to create some high quality style files.
All the best,
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)