Once the PZ3 is trimmed down, it can be saved to the Pose library as a PZ2 or P2Z file. You can create a thumbnail for the pose by saving a temporary pose to the library from within Poser, then stealing its thumbnail for the injection pose. Everyone knows how to deal with thumbnails, I assume.

The saved injection pose can be applied to the same actor you used to create it. Vertex count and order are important with weight maps, as with morphs, so if you apply the injection pose to a different actor, the best you'll get is a messy map that's all over the place.

To apply the pose, select the prop (or, in the case of a Bullet-ized figure, the... you know, the figure), then activate the pose you saved, using the library. The weight maps will be injected and the Bullet simulation will be set up for you. Open up the Bullet Physics pallet, and you'll find the listing in place, almost completely ready to use.

This process requires two more steps, once the simulation is injected. First, the process will have created a second simulation, with an incorrect name and no objects associated with it. Delete that junk simulation listing. With the good listing, you'll then need to go in and select the choreographed objects which will collide with your softbody.

The process is pretty straightforward. If I've explained it inadequately, please ask questions and I'll be happy to try to clarify.

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.