Bake and cool cake; position on foil-wrapped board. Ice background and rocker areas smooth. Outline horse, saddle and bridle with tip 3. Pipe in hooves, eye, saddle, bridle and ear with tip 5. Cover horse with tip 16 stars; pipe tip 3 dot nostril and outline mouth. Pipe tip 18 pull-out tail and mane. Pipe tip 363 shell cactus at bottom of cake. Attach supports to cookies with melted candy; let set. Position cowboy on cake. For reins, tint a 1 in. ball of fondant blue; roll out 1/8 in. thick and cut a 1/4 x 7 in. strip. Position on cake. Attach 2 in. rope piece to hand with melted candy; pipe tip 5 fingers over rope and reins. Print tip 4 message. Position message oval.
*Combine Brown with Christmas Red for dark brown shown. Combine Golden Yellow with Lemon Yellow for yellow shown.