I scanned a 6x7 slide (4000dpi -- 500MB) of a friend in a formal garden with her groom. The film had accurately captured the gray sky that day. I purchased Photoshop CS -- read a book -- watched a detailed tutorial -- created a layer -- isolated the sky; cannot for the life of me change the sky's color. I understand from the tutorial there are generally multiple ways to skin a cat in Photoshop; but none I've tried so far work on the gray sky. Help, please?