If they do not overlap they cannot be blended together into a single seamless image by any panorama software. There are lens distortions and lighting variations that effect the edges of every photo. Photos purposely shot for panoramas generally overlap by about a third. The more the better. There are several ways to make a panorama but here is a nice video primer on one way to do it. http://www.adorama.com/alc/article/Panoramas-AdoramaTV
People aren't going to remember the things you do. They're going to remember how you made people feel. Be kind, gracious, and appreciative. Dan Winters - Photographer.