Louisville, Kentucky--Keeping concepts fresh and franchise-friendly is the name of the game these days, and KFC Corp. and International Dairy Queen are working to make sure they come up winners. KFC is testing a new concept, Wing Works, a menu featuring a variety of chicken wings. Dairy Queen--soon to be called DQ Grill & Chill--is focusing its revitalization efforts on unit look and function, unveiling a new menu and restaurant prototype. -Restaurants and Institutions