DVD maker, is intended to make a single title (one movie) playable dvd.
You should investigate and try a more robust DVD Authoring program, that
will allow multiple titles and configurable menus. You most likely got one
with your PC or Burner. Look for NeroVision, Roxio, Sonic MyDVD, are the
common ones bundled with dvd burners. Most are very simple to use. you
still create your slideshow in Moviemaker, but instead of making a DVD, you
save your finished title as a movie file to your hard drive, then you import
into one of these other software's, create your menus and burn.