Need tutorial to use Pimax Crystal light with Luke Ross VR mod

I’m testing a Pimax Crystal light. I tried AVATAR in VR with Luke Ross VR Mod and it doesn’t work at all (works fine with Quest 3). I tried to play Death Stranding in VR and have a bad experience: the game is in letterbox instead of VR ! So i need help. Is there any tutorial to explain how to configure Pimax play and the VR mod settings ?