In case tu don't have Photoshop, tu can download it link
Now that tu have Photoshop, we can get started. First tu need to click File--->New---> width 800, height 100 pixels. Then tu click Ok and tu have a background.
Now tu click File--->Open and tu select a foto tu want to open. Then tu crop and resize it. I usually choose 110 o 120 height. Now right click on little window and mover to new window. Now your image is in new window and you...