I would start from scratch Bernie using the S910 REG as a guide loading all the S910 Styles /Reg you can and then tweak each one as you go along with new updated voices you like for style parts & lead voices.....then start to replace all similar styles with the new ones on the S970 with the same titles but have different parts within....yes it takes time but once you do your home work the keyboard becomes yours alone to enjoy and perform with...I always try to keep it as simple as possible,.....IMO the less styles used the better for my needs....40-50styles tops can cover anything on stage,....good luck!!