Step 1: If you using in Photoshop you will need to invert the main template layer to have a white background.

           Select the main template layer then go to: Image-Adjustments-Invert

Step 2: Place your image below the main Template layer. If the Template cutout layout is horizontal, rotate  the image 90 degrees Counter Clockwise

Step 3: Align your image according to the template cutout and print