How is the slideshow operated? is it a powerpoint document? or something a bit more sophisticated? It is possible there is simply a folder on the CD containing all the photos. Put it into your pc and open the cd without trippping the autorun by right clicking it in my computer and selecting open. see if there are any folders which contain the photos you are looking for. Don't worry abut losing any of the data, a CD is unchangeable so none of the data can be taken off and lost, only copied.