I use a program that lets me right click on an image and open a window with all of the data (EXIF Data) that the camera recorded. It's called exif viewer or something, I forget. Your camera said it was in program mode, but that doesn't matter. The advantage in AV mode is that you set the aperture value to achieve a desired depth of field and set the ISO and the camera figures out what shutter speed is nessessary for a good exposure from the other two variables. It just allows you to work faster.
To activate all the autofocus sensors at once, hit the button on the top right of the back of the camera that looks like a square with dots in it and use the control wheel by the shutter button to scroll through the sensors. You'll see on the top display a representation of all 9 sensors in the same patern as they appear in your viewfinder. Scroll until all of the sensors are shown on the top screen or look through the viewfinder and scroll through until all the points light up red. Then just press the shutter halfway down to resume shooting.