Really Important Powerpoint Question

OK guys, I have a bit of a weird M$ Powerpoint question. What I need to do is take a powerpoint slideshow that my sister made and make it into a playable DVD. I have a DVD burner from HP (a new one) but it hasn't been installed yet and I don't know what program has been bundled with it. Is there any easy way to do this-its kind of important and I really hope that I don't have to buy anything else. But, I have never really done this before.
See, what the whole thing is is it is supposed to be some kind of family photo album for my grandma (documenting her life) for Christmas. My mother and sister (with no computer knowledge what so ever) thought they could just make a slideshow (since my sister likes Powerpoint) and then burn it onto a DVD and play it-but I feel its going to be more complicated than that since Powerpoint has its own format (which I doubt a DVD player can handle). Anyway, I'm affraid that this may turn out to be a big dissapointment since I have no idea how to make a playable DVD out of this. I'm sure its possible, but I have no idea how. If anyone could help me I would really appreciate it (I hope that made sense).
Thanks!
See, what the whole thing is is it is supposed to be some kind of family photo album for my grandma (documenting her life) for Christmas. My mother and sister (with no computer knowledge what so ever) thought they could just make a slideshow (since my sister likes Powerpoint) and then burn it onto a DVD and play it-but I feel its going to be more complicated than that since Powerpoint has its own format (which I doubt a DVD player can handle). Anyway, I'm affraid that this may turn out to be a big dissapointment since I have no idea how to make a playable DVD out of this. I'm sure its possible, but I have no idea how. If anyone could help me I would really appreciate it (I hope that made sense).

Thanks!