I think I understand what you want to do, but not sure why you are unable to do it. If you create and save a style, then go into live play mode, you can select and play the new style by playing a chord. Then you should be able to go to percussion and a suitable kit for to play over it. You might have to reset the split point quite low to access all the kit components.
Alternatively, could you copy and paste channel 9 into channel 10, in style creator, then change the kit in channel 10?
mike