What do you have ? Full Kontakt or Kontakt Player ?
You could try loading the wav samples into whatever version you have and creating your own instrument or instruments, or try using the template (and accompanying video) that you can download from the RESOURCES section on Pianobook.
The Player version, I’d imagine will have limitations though like timing out after 15 minutes.
TX16Wx free version can also load these exs files (use the Home link below);