There are two ways you can use templates for your projects:
1) Import the template file into your graphics program and arrange your graphics on screen to your liking then print it out. As you can see in the first image, I have opened my "soap box" template. In the second image a I have pasted a copy of a rose image I want to use as the top of the box. All I need to do now is print this image out to use.
2) The second method is to print out the template onto blank paper, then glue to stiff cardboard. Cut out the template and use this as a permanent guide to trace around.