Steve Madden knows that everybody on the planet is going to see Sex and the City - The Movie this weekend. He also knows that whatever is seen on the foot of Carrie Bradshaw is retail gold. So he's done his research. At left, the Dior shoe that Carrie will wear while wandering the city and pondering her relationship with Big for the 8-millionth time. At right, Steve Madden's copy. He's so accommodating, he's even made a more sales-friendly version, with a lower, slimmer heel and lesser ankle strap. How thoughtful.