Making a custom body work with Sam

[Vhaltyrr 26]

I duplicated the Sam body (0 and 1), and replaced the texture paths so I could have a 'unique' skin texture for one of my followers. However, when Sam detects him he immediately gets the default Sam textures. Anyone know how I can stop this from happening? Perhaps make him a custom race? The only thing I want him to use are schlongs, but I'm willing to give that up if I can just get him to keep his custom body.

[SavrenX 10,317]

Better u replace skin in sam folder than change texture path. But if that skin not compatible you will have bad seam.

[GrayIbis2.0 0]

  I am not sure how to do this myself I made a follower that sadly has a neck seam as well, the only one that doesn't is my redguard follower: 
 http://www.nexusmods.com/skyrim/mods/84770/? 

       To be honest I've found textures that were compatible but I'm not really sure where they came from...  I am going to  say use Nifscope and/or Gimp to play around with the textures until you get something that is what you would like.