PowerDiGi fixes a very common problem with Palm devices with 320x480 screens - digitizer drift. When you tap in one place, and it registers in another, and PalmOS's calibration is of no use, PowerDiGi will help. No matter how much or how unusually your digitizer is malfunctioning PowerDiGi will make it work. For the most severe cases calibration can include up to 70(!) points, and restore normal operation.
NOTE: If powerDiGi says it will not be active because it found no data, that is ok. just run a calibrate operation inside powerDiGi and this data will be created and all will work