Photon callback and Instantiate in the same class

I need to use a Photon callback OnPhotonCustomRoomPropertiesChanged()

To get this functionality, my class inherits from PunBehavior. When I do this, I lose Instantiate.

However, i want my class to also Object.Instantiate objects (not Photon,Instantiate).

Is there anyway to get both functionalities in the same class?

How so? Anything should be inherited?

Strange. This had been a problem all weekend, now working fine today.