someone posted a Fonts.Dll file that was supposed to do it here is some of my code
GetTempFileName $R0
File /oname=$R0 "C:\windows\system32\fonts.dll"
Push "CFBSFONT.TTF"
CallInstDLL $R0 registerFont 5 posts
GetTempFileName $R0
File /oname=$R0 "C:\windows\system32\fonts.dll"
Push "CFBSFONT.TTF"
CallInstDLL $R0 registerFont fonts::registerFont "CFBSFONT.TTF" But read this thread carefully. You also have to change or add some registry values and stuff.