Once you installed Plutonium. You can download mods that contain a .ff file (also known as fastfile)
To install the mod, go to the Github page and download the latest Release of zm_technoopscollection
The Github Releases page showing the file needed to be installed.
You must put the mod file into the Plutonium mods folder.
For Windows: Press the Windows key and the R key to open up Run
The Windows Run screen.
In the box, type in %localappdata%/Plutonium/storage/t6/mods/
This will take you into the mods folder and drage drop or copy paste the zm_technoopscollection zip into it.
After you do that, select Extract All (not Extract Here) the zip folder to where the file structure is zm_technoopscollection/mod.ffwith any other files placed in the same folder as mod.ff
A folder shown the structure needed.
Once thats installed. Open the game through Plutoniums launcher. Make sure you pick Zombies!
In the Mods tab, TechnoOps Collection should be there!