Original Font: https://www.nexusmods.com/newvegas/mods/44920?tab=description
You will need to change your font in Fallout_default.ini (Steam\steamapps\common\Fallout New Vegas)
and Fallout.ini (Users\-----\Documents\My Games\FalloutNV). I also change FalloutPrefs.ini,
but I don't don't know if it helps for this.

Alternative Fonts Pack (https://www.nexusmods.com/newvegas/mods/51066) explains how each font file changes what fonts.


Basically change each font you want to be the new font by putting "fallout.fnt"
where the default font used to be.


[Fonts]
sFontFile_1=Textures\Fonts\fallout.fnt
sFontFile_2=Textures\Fonts\fallout.fnt
sFontFile_3=Textures\Fonts\fallout.fnt
sFontFile_4=Textures\Fonts\fallout.fnt
sFontFile_5=Textures\Fonts\Fixedsys_Comp_uniform_width.fnt
sFontFile_6=Textures\Fonts\fallout.fnt
sFontFile_7=Textures\Fonts\fallout.fnt
sFontFile_8=Textures\Fonts\fallout.fnt
sFontFile_9=Textures\Fonts\NVFont_Test.fnt