1. do what's explained starting with “If you still have your iOS Dev Center page in front of you, just click the link on the upper right, or go” (search for this string to find it) and ending with “You’ll also need a distribution certificate.” at http://www.raywenderlich.com/8003/h...-to-apple-from-no-account-to-app-store-part-1 . You do NOT need to do anything else before / after these.
2. Then, do what's explained in the “Getting Started” at http://www.raywenderlich.com/8045/h...-to-apple-from-no-account-to-app-store-part-2 . This adds your device to the Devportal and installs the provisioning profile.
Let me know if you run into problems.