back in the day dhp was like hpt, you bought the interface, then bought credits, they sent you a bin for your year car. some how it all became unlocked so you can just hook up and tune about any w body now. with no credits or registering with dhp, just works.
the term registering the cable is when you sync the laptop, car and interface together for the first time. once its all happy reading back and fourth its registered. and you can read write and edit bins.