Silverwood is a really nice acoustic wind instrument synth that is available at the NI online User library for Reaktor.
Its possible to get it working with the Pico with great results.
To make it work I used Reaktor standalone, with Pico set to use IAC midi bus, and set to play midi instrument.
Load the Silverwood patch into Reaktor. It needs to be edited slightly so that it listens to midi cc17, which is what midi the pico appears to send for the breath pipe. This is quite easy if you are familiar with Reaktor, I will post more detailed instructions if required, when I have a bit more time.
Some of the instrument presets respond to pitch control in unique ways, which works especially well with the pico. For additional expression, use midi learn in reaktor to map some of the other instrument controls to pico keys left and the strip controller.