For Chell too many clothes... (Portal)

Download - N_Chell_Bodygroups 30 MB.
There in the notebook written
AddonInfo
{
name Chell Nude
version 1.0
author_name Evil-Ash

info headhack and texturing
credit Nahka (body), Bloocobalt (head), Rastifan (beta tester and announcer)

override 0

Where to copy? How to install the mod?