So the URL of the datasheet is : http://www.parallax.com/Portals/0/Downloads/docs/prod/acc/28015-PING-v1.6.pdf
just hoovering over the link => right button => copy link location (firefox)
If time permits I will have a look at it, but very busy with my own stuff this week.
Could you tell more about the application, what you are trying getting done? What kind of objects do you want to detect? people, walls, rabbits, doors, ? ...