Heat oven to 400°F. Spread tortilla chips on ungreased 18x13-inch half-sheet pan, overlapping slightly. Sprinkle with Cheddar cheese and pepper Jack cheese. Bake 10 to 12 minutes or until cheese is melted.
Cut off small corner of guacamole bag; squeeze bag to drizzle guacamole over cheese and chips. Top with salsa; sprinkle with jalapeño and cilantro.