After downloading the mod, use a program such as 7zip or WinRAR to extract the main folder of the mod.
Drop that folder into the mods folder which is supposed to be in the game's installation folder (don't know where that is? click here)
Extract the "saves" folder into your "mods" folder - if you already have a "saves" folder there please do not replace it with this one and instead just take the lone .txt file from inside this mods "saves" folder and drop it into your own one, overwriting your own settings for the PVM mod.