Office Nightshift 1.1.1

If you are using the experimental version of teardown with the modloader download the "OfficeNightshiftV1.1(Modloader)" zip file and extract it. inside is a folder called "Officenightshift" simply drag that into your teardown mods folder "C:\Program Files (x86)\Steam\steamapps\common\Teardown\mods" or whatever your directory for the game is.

If using the default version of Teardown then download the "Office Nightshift V1.1" zip file and extract it then:
To install simply drag and drop the "custom" folder and "custom.xml" file into your Teardown custom map folder
"C:\Program Files (x86)\Steam\steamapps\common\Teardown\create\custom"
 

There are also readme files in both of the .zips with instructions. If you are still unsure then send me a message.