Kappa
To Install:
Step 1:
Edit your Fallout4.ini in: “Documents\My Games\Fallout4”
Find line that says: “sResourceDataDirsFinal”
Change line to: sResourceDataDirsFinal=STRINGS\, TEXTURES\, MUSIC\, SOUND\, INTERFACE\, MESHES\, PROGRAMS\, MATERIALS\, LODSETTINGS\, VIS\, MISC\, SCRIPTS\, SHADERSFX\
Save.
Step 2:
Extract: nyancat.rar inside “Fallout 4\Data”