In PowerPoint 2003, you can use package for CD and choose copy to CD. This
will include a viewer which allows others without PPT to view your
presentation.
You can also burn the presentation into CD, such as using third party
software such as Nero, or if you are using Windows XP, you can make use of
its feature: http://www.wellesley.edu/Computing/CDXP/cdxp.html