Plutonium

HELLO, I WOULD LIKE TO ASK FOR HELP AS OMM...I HAVE THE PLUTONIUM APPLICATION OR THE EXE:, AND I WOULD LIKE TO ASK HOW TO MAKE MY OWN FOLDER IN BLACK OPS 2 BY MYSELF. I DON'T UNDERSTAND THERE ARE ONLY SERVERS AND I CAN ONLY PLAY ONLINE!!!... BUT I WOULD LIKE TO PLAY ALONE IF YOU ANSWER THEN THANKS FOR YOUR HELP