(I may cross-link this better tomorrow. It;'s late. For now...)
  • Unpack Main.pak and Textures.pak using the most current lstools.
    • Hair model files (CP_F_HAIR_A-H.GR2 and CP_M_HAIR_A-G.GR2) can be found here:
      unpacked main\public\main\assets\characters\players
    • CP_F_HAIR_F.GR2 and CP_M_HAIR_E.GR2 are bald heads and have no texture files.
    • Otherwise, hair texture files (3 files for each, extensions .DM, .NM and .SM) can be found here:
      unpacked textures\public\main\assets\textures\characters\player
  • Decide which stock hair you don't want, and which hench-hair you do.
    • There's a picture/listing of the hench-hair floating around.
      • Female hair 1 is CP_F_HAIR_A - Madora
      • Female hair 2 is CP_F_HAIR_B - mostly shaved with a topknot
      • Female hair 3 is CP_F_HAIR_C - shaved on one side a la Skrillex
      • Female hair 4 is CP_F_HAIR_D - one thick side braid
      • Female hair 5 is CP_F_HAIR_E - two braids down the back
      • Female hair 6 is CP_F_HAIR_F - bald
      • Female hair 7 is CP_F_HAIR_G - high forehead and a loose french braid
      • Female hair 8 is CP_F_HAIR_H - long with a bandanna headband
      • Male hair 1 is CP_M_HAIR_A - Jahan
      • Male hair 2 is CP_M_HAIR_B - side part and comb-over
      • Male hair 3 is CP_M_HAIR_C - center part
      • Male hair 4 is CP_M_HAIR_D - Prussian - shaved sides, short on top
      • Male hair 5 is CP_M_HAIR_E - bald
      • Male hair 6 is CP_M_HAIR_F - long and tied back
      • Male hair 7 is CP_M_HAIR_G - cropped close
    • If you want to use Madora's hair, look up Mr. Esturk's Companion Hair mod - Madora's textures files use washed out colors by default, and he made or found replacements.
    • The male hench-head model is narrower than the male PC head model.
    • You may want to test them all in game to see which ones don't work for you.
  • In the main game installation's data folder, set up the same sub-folders structure that you found the files in.
    • Starting with data\public\main\assets\etc.)
    • You may already have them if you've been messing with stock faces and so on.
  • Copy the hench-hair files you want - models and textures - into the two correct folders and then rename them.
    • PC hair file names start with PL rather than CP. Probably "player" rather than "companion".
    • In Character creation, female hair is displayed in order.
      • Female hair 1 is PL_F_HAIR_A - long curls
      • Female hair 2 is PL_F_HAIR_B - short and loose
      • Female hair 3 is PL_F_HAIR_C - very short
      • Female hair 4 is PL_F_HAIR_D - long and loose
      • Female hair 5 is PL_F_HAIR_E - like B but even length
      • Female hair 6 is PL_F_HAIR_F - shaped pixie
      • Female hair 7 is PL_F_HAIR_G - full afro
      • Female hair 8 is PL_F_HAIR_H - long dreadlocks
      • Female hair 9 is PL_F_HAIR_I - short cornrows
      • Female hair 10 is PL_F_HAIR_J - long and braided back
      • Female hair 11 is PL_F_HAIR_K - odd flipped ends
      • Female hair 12 is PL_F_HAIR_L - Princess Leia braids
      • Female hair 13 is PL_F_HAIR_M - pig tales
      • Female hair 14 is PL_F_HAIR_N - shaped bob
      • Female hair 15 is PL_F_HAIR_O - chignon
    • Male hair is displayed in the following order because why would they make it easy?
      • Male hair 1 is PL_M_HAIR_A - mullet
      • Male hair 2 is PL_M_HAIR_H - full afro
      • Male hair 3 is PL_M_HAIR_J - spock
      • Male hair 4 is PL_M_HAIR_O - mohawk
      • Male hair 5 is PL_M_HAIR_F - extreme fauxhawk
      • Male hair 6 is PL_M_HAIR_G - short dreadlocks
      • Male hair 7 is PL_M_HAIR_C - military buzz
      • Male hair 8 is PL_M_HAIR_B - long and loose
      • Male hair 9 is PL_M_HAIR_L - monk
      • Male hair 10 is PL_M_HAIR_M - anime
      • Male hair 11 is PL_M_HAIR_N - samurai
      • Male hair 12 is PL_M_HAIR_D - short and loose
      • Male hair 13 is PL_M_HAIR_K - ponytail
      • Male hair 14 is PL_M_HAIR_I - flat top
      • Male hair 15 is PL_M_HAIR_E - don't know what the hell to call it.