Heat oven to 350°F. Line cookie sheet with foil. Lightly spray foil with vegetable cooking spray. Break graham crackers into 1/2- to 1-inch pieces; spread on prepared cookie sheet.
Place butter in small microwave-safe bowl. Microwave at MEDIUM (50%) 30 seconds. Add chili powder and cayenne pepper. Stir until butter is melted and mixture is blended. Drizzle over graham cracker pieces.
Bake 10 minutes; gently stir or turn over pieces. Bake an additional 10 minutes. Remove from oven; cool completely on tray on wire rack.
Remove wrappers from chocolate bars; break into sections. Toss graham cracker pieces with chocolate bar pieces, cinnamon graham cereal, marshmallows, popcorn, pretzel sticks and peanuts. Store in cool, dry place.