Create it with iMovie HD
the bet way is to create your slideshow as an iMovie project. iMovie will allow you to manipulate the location, the volume, and the fade away of your music. when you have it the way you want it, from the Share menu, select iDVD. when iDVD opens up, choose your theme, name your movie, Create your project, and Impress all your friends and family. I strongly recommend you make good use of the wonderful Ken Burns Effect available to you within iMovie.
Good Luck
Hector