I just tried to create navigation based application via xcode 4.2 and all I found in the new window have nothing to do with navigation based application .. I found page b
You have to insert Master detail app. This template provides a starting point for a master-detail application. It provides a user interface configured with a navigation controller to display a list of items and also a split view on iPad.
When you press Next after selecting the project template, there's a few checkboxes at the bottom of the screen. One of those is "Use Storyboard". Untick that and you'll go back to the old way of designing interfaces.