Editing screenshots in iTunes Connect after iOS app was approved

Question

In the iTunes Connect App Management interface -- how do I edit the screenshots for my localized (approved and live) iPhone app?

Unfortunately, the web upload form h

Answer 1

The current standing on this has changed to:

Beginning January 9 [2013], app screenshots will be locked in iTunes Connect once your app has been approved. New screenshots may be uploaded when you submit a binary for an update to an existing app or a new app.