In a saucepan melt everything together and stir until smooth. (Especially the cream cheese. Just keep whisking together until there are no cream cheese globs left) Don't boil.
1 Can Mushroom Soup, 1/2 Cup Butter, 1/2 Cup White Wine, 1 Package Dry Italian Salad Dressing Mix, 4 Ounces Cream Cheese
Place chicken in a 9x13" pan and pour sauce over all of the chicken.