In A Saucepan Filled With Water, Boil The Frankfurters For About 5 Minutes. In Another Saucepan, Combine Barbeque Sauce, Dry Mustard And Baked Beans. Stir And Heat. When The Frankfurters Are Cooked, Combine Them With The Sauce Mixture For About 10 To 15 Minutes Or Until Heated Through.