I use Win XP ver 5.1. I also use a product called Wallpaper Changer. It is directed to use a specific photo folder containing pics of varying sizes. My problem is I cannot get the resulting wallpapers to center. They always stretch. There is no check box in the Changer software to address this. Using desktop display properties does not help either. It gives me 3 options for wallpaper - center, tile or stretch - I click center and ok, but nothing happens. I go back in there and find "stretch" has been highlighted again. What's happening? The stretched images are often poor and pixelated. I want them centered in their original size.