Ok...so I failed. I feel that maybe I'm doing things in the right order. At risk of typing a text wall, here's my set-up and questions:

Setup: New Mac Pro. 4T external drive. On that external drive I created a folder called Poser. Inside Poser I created a Michael 4 folder with a Runtime subfolder. I then "manually" downloaded all the files, unpacked them, then copied and merged the package's Runtime folder with the one in the Michael 4 folder. I ran Poser, clicked the +Library button, pointed it at Michael 4 folder on the external drive. Poser seemed to find it just fine. I can click Figure, find Michael 4, click the double-check and add him to the scene (then it defaults to having his HIP be the default target...?). I can add clothes, etc.

So Poser seems to work and seems to find the stuff in my external Runtime.

I looked in the directory and found the DzCreateExPFiles-M4.bat file. It didn't run...but that's because I'm on a Mac, I think. A .command version exists and when I double click that it seems to run. So that's a thing. I've tried various sequences, but nothing's working... Do I run the Script in Finder, then start Poser? Do I start Poser load Michael, go out to Finder and run the script and it hits the guy I have loaded? Do I run Poser, load Micheal and there's a menu/button somewhere in the Poser interface itself that I use?

What's my sequence of steps?