It is indeed possible. And fairly easy too. Morphs will always have a dial, that's the way you apply it :o) To make something like a wall-and-door, import the wall and the door as 2 different objs (or make them inside Poser out of primitives) Then you move the pivot point of the door with the joint editor so that it is where the hinges should be. Save them bot to the Props palette using "Select Subset" and voila, you've made a door. I know this is a very simplistic explanation. It's easy to DO but I'm not good at explaining how. Others have done so though, try a search for door in here, I bet there'll come something usefull up from that search.

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.