Light Shrimp Fettucine Alfredo

6 oz uncooked fettucine (I used wheat the first time, it was ok, but we prefer this one with non-whole wheat noodles)
2 tbsp butter (I use light real butter)
4 1/2 tsp All Purpose flour
1 cup Fat Free half and half
1 lb cooked medium shrimp, peeled and deveined
1/3 cup grated parmesan
1/2 tsp salt
2 tbsp minced fresh parsley

Cook fettucine according to pkg directions. Meanwhile, in large saucepan, melt butter. Stir in flour until smooth; gradually add half and half. Bring to boil; cook and stir for 1 min. or til thickened.Drain fettucine; stir into pan. Stir in the shrimp, cheese, and salt; heat through. Sprinkle with parsley just before serving.