Brown ground beef in medium skillet, drain if necessary. Add taco seasoning per package instructions.
In medium bowl combine sour cream and salsa; set aside. Coat a 13X9 inch baking dish with cooking spray.
Place 3 cups of the rice in pan; top with half the sour cream mixture. Layer the seasoned ground beef on top, then 1 ½ cups cheese.
Add remaining rice then sour cream mixture. Cover with foil. Bake in preheated 350 degree F. oven for 15; remove foil. Sprinkle with remaining cheese and crushed chips. Return to oven and bake an additional 5 minutes or until cheese melts.