Customer Web Pages - require a background image to fit the screen and have a area to place the text.
theimagefile does not offer technical support for PhotoShop or any other image editing software, however we have added a couple of screen shots here to give you the idea behind making a multi-image background image for customer web pages.
Screen shot of image in final stages in PhotoShop
the final image (reduced) saved as jpg
After uploading the text box was positioned
The final result
If you wish, you may download the finished layered PhotoShop document (5.4 MB).
View the full help article on creating Customer Web Pages.