I have pictures that I had taken with my Canon T3i Rebel, they have a .CR2 file extension. I am using Picasa as a photo viewer. When I choose to view them as extra large icons the pictures do not show up rather an icon with 2 green trees and a dessert background and blue show on the icon and I would have to click on it to see what the picture is. It does not do that with JPG file extensions . any solution to show the pictures .