Simply add the textures folder into your Fallout 4 folder this should be in located in your C:\SteamApps\common\Fallout 4\
Make sure you have edited your Fallout4.ini file located in 
...\Documents\My Games\Fallout4

FIND:
sResourceDataDirsFinal*STRINGS\

CHANGE TO:
sResourceDataDirsFinal=STRINGS\, TEXTURES\, MUSIC\, SOUND\, INTERFACE\, MESHES\, PROGRAMS\, MATERIALS\, LODSETTINGS\, VIS\, MISC\, SCRIPTS\, SHADERSFX\

Now look out for that dirty Med-X