Ok let me explain how campaign works. those personal saves are only a thing that loads your progress. You have to .map mod campaign maps like in halo 2. There is a whole lot of research to be done but all you can do now is change the load spot.
I am starting a new project for a program that will edit films, pics, and gametypes. Eventually I will add usermaps. I want to implement a signer so when I am finished if you have one and would like to be the first to test it. PM me. This is the topic where I will post pics of my project.