1. Download the file
2. Look for the cover layout you need in the images
3. Open the 3 files "a" "dark" and "light" in that layout through Photoshop.
4. Drag "dark" and "light" into the "a" file and square it up.
5. Set the "dark" to screen and the "light" to multiply in the layers.
6. Save that as your template for future use as a PSD file.
7. From your cover cut and paste the back, spine, and front all separately and transform them to fit inside the template.
*note* the pasted images need to be behind the "dark" and "light" layers, and the *a* layer should be turned on as a guide, and turned off for a white background.