Ed,
Again, I'm not at the store but what I remember is this. All of the one touch setting in the PSR9000 and Pro unlike other Yamaha keyboards can be changed to your liking. The one touch setting from the factory are all editable. If this is in fact what you wish to do then I would think that if you can change the voices, effects, etc. then you should also be able to turn the sync button off and then store the new settings to the one touch setting buttons. Remember to back up the original one touch settings because there is no way to initialize the 9000. Yamaha has posted the factory original settings on their website in case you loose them.
George Kaye