Then in that Armor record it calls all the armatures per race/style, and those armor addons call the unique mesh & texture sets for female/male of all player options race/vamp/wolf, a body, feet, hands, head, tail directory for each possible option.
The (Unique Character.esp) didnt make a custom race though, it used a custom armo attached to the Player Prisoner NPC record. I noticed the schlong texture as listed in the nif was not the one being loaded(was not where listed), instead using the texture as detailed in the. Its setup as SOS as an ESM, with esp for each schlong type having texture set & size tweaks for the additional races.
The esp uses a base texture set, & different texture set per race for the diff. nif or swap textures from the list in the.