OK for this I've searched and searched and can only and I do mean only find info related to how to take a screenshot or where to find them in our systems, but I need to know WHERE to put my screen shot once I've got one - do I add it somewhere in my app in Xcode or somewhere else?
For clarification, I'm talking about setting the screen shot for the image that's shown in the app store, like the application screen shots you'll see here https://itunes.apple.com/ca/app/run-map-my-run-gps-running/id291890420?mt=8
So with that said, are there 2 kinds of screen shots that are needed before submitting my app for approval?
The App Store screenshots are added as part of the process of submitting an app in iTunes Connect. They are not added to the app itself, they are uploaded in iTunes Connect.