Heres another window file you could use for cards for any occasion. The background picture is not included. Just cut out the window in cardstock, then place the picture of your choice behind the window and trim it to the shape of the window, and add it to your card.

You could also place acetate between the window and the picture, to give the appearance of glass.Another way is to Release Compound Path and delete the outside line of the frame, and just cut out the window panes in your cardstock.