diddy132 probably best to join the discord to get faster help...
what is it you are doing, you say you can't get it to work but in the first post you say you can't find your bo2 files.
the default location of your game is:
Program Files (x86)/steam/steamapps/common/Call of Duty Black Ops II
if you didn't install it there, then whatever folder holds your game files is the one you'll use.
click "SETUP" or "game settings" on your plutonium launcher...
click "Select DIR"...
browse to the correct folder that has your copy of the game in it (see above path)...
click "Select Folder"...
You should now be able to click "Play"
If not, what error are you getting?