Don't staple the ends of the zipper down. The zipper is a separating zipper, which means it's just like the zipper in your jacket. You can cut off some of the excess zipper on the end that is the opposite side of where you start zipping. You will need to put some stops on each side of the zipper tape to keep the zipper head from sliding off.
I can't tell what you're talking about in the first picture.
No one lives forever, the trick is creating something that will.