Step 1: Open underlying photo. Use the Texture tool to add a "weave" texture, set to blend mode = screen. This creates a nice faded background for the other images.

Step 2: Go to the Overlay tool, choose "Your Own" to add each of your photos one at a time.

Step 3: After adding the photos, drag and resize them to suit your composition.

Step 4: Head over to the text tool to add your title.

And voila!