I have an iphone 3GS and i like to set pictures for people when they call me. I noticed that i can manually set the picture to full screen while on the iphone. However, i also noticed on the iphone TV ads that a small thumbnail like picture comes up to the name of the person. How does a person add that little thumbnail picture to ppls contacts when they call?? I hook my iphone up to my macbook pro.. and all my contacts are stored there.. Any thoughts/help is much appreciated!!