Brown meat in large skillet; drain. Stir in macaroni dinner (noodles) and water. Reduce heat to medium; cover. Cook 5 to 7 minutes or until macaroni is tender.   Add cheese sauce mix (from dinner), taco seasoning, salsa & corn, mix well until dry ingredients are well blended. Reduce heat to low and simmer until heated through, stirring occasionally.  If desired, sprinkle on grated cheese and cover to melt before serving.