I am pretty sure this IS possible, I have a working theory, but I would need to run a few tests.  In short it would involve some editing of the PP2 I believe...as Y-Phil suggests. I would need to see how much needs embedded, and where to embed.  I think you might be able to embed partial pose data and a few needed lines to target a figure from a Pose of the hand into the PP2.  Make backups before trying. I suggest using Notepad++ with the Poser extension for the editing. 

I have done this to embed prop positioning in a figure pose with parented props for some time...but not loading the pose with the prop.

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