INSTALL
Unzip the files. There should be two .mem files.
install using Mass Effect Modder (v516+)
you can find it by using ME3 Mod Manager > Tools > Mass Effect Modder (Legendary)
from there, under Mass Effect 3 on the right, select Mods Manager > Mods Installer
Select "Add to list", navigate to the ReducedInteractionHUD.mem file, and select it
Click "Install all mods" or "Install selected mods"
You're good to go!

(NOTE: install texture mods after loading content mods)

UNINSTALL
use UninstallReducedInteractionHUD.mem to override back to the original

MODDERS
if anyone wants to use these arm/hand textures as part of your mod then go ahead, no need to ask