Preheat oven to 350*F.
In a large bowl combine 1 pound sliced franks, one 16-oz. can pork and beans, in tomato sauce, one 16-oz. can butter beans, drained, one 16-oz. can hot chili beans, 1/2 cup brown sugar, 1/2 cup chopped onion, 2 Tbsp. wine vinegar, and 1/4 tsp. dried oregano, crushed. Turn into 2-1/2 casserole dish. Bake uncovered for 2 hours, stirring occasionally.