Automated script to replace images in a template

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I am a rookie with photoshop.  I have a template that I am trying to replace all the images with images from a folder.  The white spots are photo nodes where pictures would be, but I can't figure out how to bulk insert the photos in the template.  The left and right side would be the same, but a total of 3 different photos.

[JJMack]

Free Photoshop Photo Collage and Mockup Toolkit