In Game Fonts

[Elderin]

I have not found a really good explanation of game fonts used.
But if I am right there are four fonts used in WoW.
skurri, MORPHEUS, FRIZQT__ and ARIALN

These fonts must be hardcoded within executables somewhere since I cannot locate them within my WoW installation folder/sub-folders. I can look at the Fonts.xml file and see them referenced such as

<Font virtual="true" font="Fonts\ARIALN.TTF" name="NumberFont_Outline_Large" outline="NORMAL"> 
  <FontHeight> 
    <AbsValue val="16"/> 
  </FontHeight> 
</Font> 
<Font virtual="true" font="Fonts\skurri.ttf" name="NumberFont_Outline_Huge" outline="NORMAL">
  <FontHeight> 
    <AbsValue val="30"/>
  </FontHeight> 
</Font> 
<Font virtual="true" font="Fonts\MORPHEUS.ttf" name="QuestFont_Large">
  <FontHeight>
    <AbsValue val="15"/>
  </FontHeight> 
</Font>

It appears the fonts (for example ARIALN.ttf) should be in a "Fonts" folder. Since I do not see such a folder currently I made the assumption that they are hardcoded somewhere.

I also understand that I can create my own "Fonts" folder within my WoW installation folder and place a font in that folder. However, doing so does not just add the font to Wow and make it available for use. But, I can rename it to one of the four WoW fonts, mentioned above, and bingo, all the places that font is used in WoW now looks like the font I put in the Fonts folder. So, apparently I can locally override a standard game font by this procedure. But only locally.

However, if I want to use a specific font other than the four basic WoW fonts in my addon so that users of my addon see that font can I:
create a Fonts folder in myaddon folder structure, i.e., myaddon/Fonts
place the desired font in that folder (assuming it must be a truetype font)
within xml create a font object based on my desired font such as shown above for "QuestFont_Large"
and then create FontStrings based on my new font object?