Cover flow works by using the UICoverFlowLayer class, which is private and undocumented. If you attempt to use it, Apple will refuse to release your app on the app store.
You might be able to create a hand-made solution using Core Animation, but it would be difficult to accurately emulate the way cover flow works, and may also annoy Apple. Consider using some other interface.
This discussion on the Apple website has more information that you might find useful.
