Does this help?
Otherwise, the Windows font library is a way to get symbols into programs. You must do that one font at a time. CAD is like that more than ESRI.
Since this thread is seven years old, I am guessing that the original poster has either moved on or found the solution they needed. But, thanks for providing that link! I see that it was created by one of our local celebrities, Curtis Price!
Thanks for tipping me Adrian so i could add the following info to this thread:
Unfortunately the EGIS style file setup discussed on the linked my.usgs page is an MSI package just used internally in USGS. However you can get the Windows TrueType fonts and .style files that use it here. After you install on the ArcMap side, you can then import the .style files into .stylex for use in Pro too.''
Here's the place to go for that. Looks like this was recently updated (4/2018):