He who is Paul said on Tue, 28 Nov 2017 22:47:20 -0500:

Once the driver is installed, you need to get it to
"Print to File" and not go looking for a physical
printer. That's part of the puzzle you have to solve.
This is not a 10 minute job, and there will be
a bit of research.

Thanks Paul.
It seemed so promising a road to go down, that I traveled the road,
following all the signs, until it stopped me at a dead end of sorts (which
you predicted).

I first went he
http://www8.hp.com/us/en/solutions/b...tions/upd.html

Which had this download page for an "HP Universal Print Driver"
https://support.hp.com/us-en/drivers.../model/4157320

Specifically this file:
http://ftp.hp.com/pub/softlib/softwa....5.0.22695.exe
Named: upd-ps-x64-6.5.0.22695.exe
HP Universal Print Driver for Windows PostScript (64-bit), Win10
version 6.5.0.22695, 18.9 MB, Sep 26, 2017

Doubleclicking on that file brings up a WinZip Dialog which defaults to:
c:\HP Universal Print Driver\ps-x64-6.5.0.22695\

Which has an "install.exe" which when doubleclicked says:
"Welcome to the HP Universal Printing Setup Wizard"
Whose choices a
(_) Traditional Mode - Creates a regular printer object in your Printers
folder. With this mode, you select the destination printer now, and
it remains fixed.
(o) Dynamic Mode - Creates a special "Universal Printer" object in your
Printers folder. With this mode, you can dynamically select your
destination printer each time you print.
(_) USB mode - Plug and Play

When you hit "Next", you see a dialog saying "Copying files" for
"HP Universal Printing PS".

Then it pops up the Windows:
Control Panel All Control Panel Items Devices and Printers
"HP Universal Printing PS"

Bringing up a text file, I press "File Print" and it allows me to
choose the printer "HP Universal Printing PS" and [x]Print to file.

The default file name extension is *.prn

But then, it asked me to "find" a printer.
And it pops up a file system browser.
What?
How am I supposed to find a printer on my file system?