Measure out the cereal and place in a large bowl. (It doesn't need to be perfect-you're going to use the whole box, so just split it in half if you don't want to measure it out.)
Add the powdered sugar and crushed Oreos to a gallon sized plastic bag.
In a small bowl, melt the chocolate chips and stir until smooth (this only takes two 30 second intervals in the microwave with some stirring).
Pour melted chocolate over rice cereal in the large bowl and stir gently until coated.
Transfer chocolate coated rice cereal into your plastic bag with sugar/cookies. Shake, shake shake until coated evenly.
"Cream Mix"
Repeat steps 1-5 using "Cream" ingredients.
Once cooled, mix the "Cookies" and "Cream" mixes together in a large bowl and fold in extra chopped Oreos.
Serve immediately, or store in an air-tight container.