Worra's Prophet, the Prophet-5 pack, now includes sfz format files. This means that you can use the free Sforzando sampler to play the instruments. Sforzando works both on PC and Mac, both as standalone and in all popular plug-in formats. You can download Sforzando here. Check out Worra's Prophet here. If you already have the instrument, but want the sfz files, you can download them on a link from the same page.