Well when I make my suits I have them on a duct tape dummy. So I take a corner and lay the netting on the front side of it so it covers the arms. The just start cutting around the dummy making sure I leave a little extra to go over the back side. Then flip and do the back side. You should have a little left over that you cut away and you can use those plastic zip ties (they have them in smaller sizes and black too) and zip them together. Or you can just tie the two sides together and then glue the knot it so it wont ever seperate. I even glue a few spots under the armor with Shoe Goo. If you do that you don't want to go all the way out to the edge with the glue though.
Thats how I do it. But everyone else has to put netting on their suits so maybe they will chime in with the way they do it. B)