Search the forum for photo gallery topics. You will find plenty of threads and suggestions about it. You will get 327 results presently.
just look around in and on these pages and don't get confused by the large range, look at the different sides in peace, it is worthwhile.
http://www.1stwebdesigner.com/resources/57-free-image-gallery-slideshow-and-lightbox-solut ions/ (Countless (57 possibilities) :-)
...and follow Nini Tjäder and altruistic gramps hints particularly as to Google.
...and here some tutorials:
http://www.google.de/#q=dreamweaver+slideshow&hl=de&prmd=v&source=univ&tbs=vid:1&tbo=u&ei= 2FrqS-X0MoqMOOrv2OkK&sa=X&oi=video_result_group&ct=title&resnum=4&ved=0CDMQqwQwAw&fp=79a60 95848c03fc9
or a DW extension: http://www.fourlevel.com/extensions.htm