Put femalebody_d.dds in:

.../fallout 4/data/textures/actors/character/basehumanfemale

For male tattoos:

.../fallout 4/data/textures/actors/character/basehumanmale

Go to:

Documents/my games/fallout4

Open:

Fallout4.ini

Replace:

sResourceDataDirsFinal=STRINGS\

With:

sResourceDataDirsFinal=STRINGS\, TEXTURES\