B: They are not fonts, they are icons stored in UI-LFG-ICON-ROLES.blp. I've changed mine and use Stuf unit frames. Edit the blp file. Place it in Stuf's media folder and then edit part of one line in icons.lua to point it to "interface\AddOns\Stuf\media\UI-LFG-ICON-ROLES. tga" instead of "interface\LFGFrame\UI-LFG-ICON-ROLES".
The first answer you got from tordenflesk with the link gave you all the info you need.