Gallium OS. Not sure what ver, etc. because I've been drinking pretty heavily since I posted the question.
I'll check your link tomorrow and get back to you.
Gallium OS
Simple answer:
sudo apt install gnome-font-viewer
It has an "install" button.
Set it to open font files from your file mangler and you'll be overloading your system with ridiculous new fonts in no time.
I shall try this immediately. Thanks!
EDIT: This froze my crappy machine so I had to restart.
:-)
Bugger.
If it's specifically the MS Fonts installer that's screwing you up, you could ...
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