I made a guide for people like me who don't really know how to do that much. I have seen bits and pieces of how to do this and one halfway done version.
Many of us have not spent 10 years editing ARMA 2 or 3. We need details, so when I made this detailed thing and got it to where it works everytime I made a guide. Make sure if you need this to check out the pictures in the links of the 2nd section.