Cover bottom with peach mixture. In a mixing bowl, add remaining ingredients (except butter) and stir. Cut butter into small squares, and mix in w/ fingers until mixture forms crumbs. Distribute evenly over fruit mixture. Bake @350 degrees (50 minutes) until golden brown bubbly. Something I have seen done before, is to prepare fresh peaches (peel and slice) and let sit a few hours with sugar and any other seasonings. Then freeze for a few days before using. This makes the peach flavor pop and should be pretty darn good when used with the crisp topping below and would make advance preparation a snap.