Depends on DVD player. Some allow you to play jpgs back from a disc, but probably the easiest is to make a slideshow of the photos you want using something like ProShow gold from photodex.com
You then burn tyhe show to a dvd which plays like a standard DVD. You have to ensure your mother's DVD player is able to play burned DVD's e.g I have a player that will only play burned DVD-R discs DVD+RW but not DVD-RW.
Not sure if Nero has the ability to do the same as Proshow Gold.