Replacing vanilla race with custom race

[Fredas]

I have just now learned that there is no method for forcing the game to recognize a custom race as Breton or whatever (through dialogue and whatnot).  I'm eyeing Lovergirl Race as my race of choice solely for the unique and essentially inimitable face.  But I intend to play as a Breton, and I want that executioner record keeper to address my character as such. ;p

 

Basically I'm hoping there's some standardized process for taking the assets of a custom race and repurposing them for use as a vanilla replacement.  Lovergirl Race comes with faceparts (.tri files) and even some scripts for controlling werewolf / vampirism and such.  It really seems like it might be no simple task unless there's a guide of some sort.