How to Add a provisioning profile to an iPhone/iPod in iTunes
When you want to test an app you or someone else has compiled (and not released on the App store), you need a provisioning profile added to your device. Fortunately, the process itself is quite easy. So easy, in fact, that this coder's guide can present a complete overview of the process in just over a minute. For more information, and to get started adding provisioning profiles to your own Apple devices, take a look.