The Tyros does not sample and will not import samples of any kind. The only Custom/User programs that could be imported from a 9000 or 9000 Pro would be those that use the same waveform ROM that the Tyros, PSR-9000, and 9000 Pro share in common. Other than that you are out of luck. You can thank Yamaha for not implementing sampling in the Tyros even though the Tyros is based on the 9000 Pro's sound engine and could easily have supported it.