From the blog "lisander68"

Today I will explain step by step how to apply an SMP to the Femalebody with the help of Nifscope and xml files (BaseShape).   The folder containing the necessary xml should be pasted into the path skyrim\data\skse\plugins\hdtSkinnedMeshConfigs   NifSkope_2_0_2016-04-20.7z BHUNP.rar   First download Nifscope and install it, then open it.     Once the programme has started, go to File and then Open       Follow this path