Including Duwi Remote Control into OH2 to control non Z-WAVE devices

I’m using 3 Z-WAVE devices that I control via Aeon Labs Z-Wave Z-Stick through OH2 among other non-ZW-devices . Now I included a DUWI remote control into my ZW network, so I can control my ZW devices through OH2 AND my remote controller. Because this remote is capable to control 7 ZW-devices, I would like to use the remaining keys on my remote to send commands into OH2 to control non-ZW-devices also.
Does anyone know how to pair my remote with my ZW-stick in a way, that OH2 receives a key-press (i.e.: key 4-up pressed)?
Thanks in advance