(Help) Replacing an NPC face with another.

[Handsome Squidward]

I can't remember how to do this properly.  I am trying to replace the face of an npc with another.  I take the records of the npc from the source esp and copy it exactly to the active esp.  I use the source npc as a base and copy its traits.  I then rename the facegen and facetint files of the source to the base ref of the npc I want to replace.  What I get is shit.  

 

Is there a guide to this?

[Jerok]

If I had a face like that I'd want to replace it too!

 

Make sure the facegen NiTriShapes have the proper names (You can use nifscope for this). Compare the names between each facegen or look for the face part ID's in the esp.

[prinyo]

http://www.nexusmods.com/skyrim/mods/64875/?