I am sure he'll have one for the PSR-300 as he is supporting the PSR-500 currently. In the case of the PSR-300, it should almost be a clone or extension of the Win97 software as the radio is looking so similar to the Pro-97. Don could probably answer in regards to timing, I guess it depends if he gets a radio before it's officially released, and how much work he needs to do to adjust his software. But the basic structure and functionality is the same as the Pro 97. Ideally he'd create one piece of updated Win97/Win300 software that could easily support all four radios (Pro97, 2055, PSR-300, 400).