Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.
You don't actually need iPhoto to create a slideshow in iDVD. By itself, iDVD has all the tools you need to create interactive DVDs that include movies and soundtracks as well as slideshows.
But using iPhoto can save you a lot of time and trouble. You can use iPhoto to preview, edit, and organize all your photos into albums. Then, once your photos are arranged into neatly organized albums, one click hands them off to iDVD, which converts them into a DVD-readable format. iDVD also hooks up all the navigational links and menus needed to present the show.