Below are two close-up photos of the cracked pieces.
The window is framed in a thin channel, but fortunately, it is also framed in wood. The extra reinforcement of the wood frame saved it from being destroyed beyond repair.
In order to effectively repair any stained glass window, it must be laying flat. Notice (below) that this window has 3 inset faceted cabochons which protrude on both the front and back sides. While these are lovely accents, they make it necessary to place something like a magazine under the window as its being worked on.
Below, I'm using a pistol grip glass cutter to score a cracked piece using a cross-hatch pattern. For several of the pieces, I needed to carefully turn the window over and score it on the opposite side as well.