To break the locks you have to have someone in the car standing on the breaks. The hubs actually lock on. They can not unscrew without the special socket which has a plunger in the center which presses in on the lock releasing it.
there is an adjustable pedal depresser that can be set onto the driver seat bottom cushion front edge, other end to the brake pedal lever -- this applies static pressure on the brake pedal, then you can do the centerlock wheel swap as a one person job