It all depends on how the pictures are set up in your presentation. If they fill the whole screen then it is just a matter of printing out the particular slides. If you want to print pictures that are smaller or more than one to a slide, then you going to have to extract the images and use other software like a paint program to print them. If the latter is the case, then saving your presentation as an html file will extract all the images for you and put them into a folder.
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Michael Koerner
MS MVP - PowerPoint
How do I print pictures from an exisiting power point presentation?