Have you seen this thread?
http://forums.pelicanparts.com/porsche-911-technical-forum/1134997-efi-tuning-how-process-description.html
Jamie put down a lot of info from his years of experience.
He also has a great method to cover most of the cells. He calls it left foot dyno. You use the throttle to hold a steady rpm of the cells you want and then by applying the brake and giving more throttle to keep it at the proper rpm, you can cover the whole scale. He discusses this starting at post #6