Empty the jell-o packets into a bowl. Stir in the boiling water and mix until the jell-o is completely dissolved. Stir the cold water into the jell-o, then stir in the whiskey. Pour the jell-o shot mixture into plastic shot glasses (or small disposable plastic cups). Place in the refrigerator and chill until set (about 1-2 hours but it will depend on the size of the shot glasses). You can also pour the jell-o mixture into a square pan and chill. When set, cut into cubes to serve. This recipe works well with sugar-free jell-o as well.