In a medium mixing bowl, combine the jello and hot water. Mix until the jello has dissolved.
Add the orange juice and peach schnapps. Stir well.
Using the injector (or cup) fill each shot cup about ¾ of the way full.
Place in the fridge and chill for about 2 hours or until set.
If using the garnishes, add some whipped cream to the top of the shots and use a butter knife to even off the top of the shots. Add a peach slice on top of the whipped cream.