Unzip the file and place the contents into the paks folder in the game's files.

Update 1.1 Shattered Roxy is now replaced with Grungy Hour 3 Freddy

Update 1.1 Shattered Roxy is now replaced with Grungy Hour 3 Freddy and files are renamed for clarity. Make sure to rename the "pakchunk0" file in the games paks folder so that it appears at the top of the list. Only mods below it in the list will load.