In large mixing bowl, combine soup and warm water. Add chicken, 1 cup cheese and 2 cups crushed tortilla chips. Mix together and place in 7 x 9 or 9 x 9-inch greased baking dish.
Spread salsa evenly over chicken mixture; top with remaining crushed tortilla chips and cheese. Bake in preheated 350°F oven 20 to 25 minutes, until hot and bubbly.
To serve, place a row of whole tortilla chips down center or around edges of casserole and garnish with remaining ingredients.
