Start a new game, design a new character (face) and when done go to Console command (~) and press SPF (SavePCFace) and the Character name (SPF + space + Name) to export the face to the Data Folder. Make certain it is spelled correctly. Then exit game.
Create a new NPC. Add Unique and Essential, with a Voice (for marriage NPC followers find one that matches)from VoicesFollowerAll form list. Disposition above 75. Set level (etc.). Factions: (-1) CurrentFollowerFaction and PotentialFollowerFaction (0). PotentialMarriageFaction (0). Relationship = Ally. AI = Aggression (not anything higher) and Foolhardy (won't flee). Set Morality to Any Crime. SAVE MOD. Import character appearance. Character Gen Parts tab = Import Tab - find character image file and select it (name.npc). Once you've imported your follower, click OK to save your work then
select them in the Object window and press Ctrl + F4 to export their
face settings. If you try to export your character's face and nothing happens, make sure that the Is CharGen Face Preset box is unchecked. SAVE.
I will try this to see if the above advice works. (wish me luck!).
PS: It works!