“REAL Housewives of New York” star Alex McCord is best known for nude photos of her that hit the Internet, but she’s now putting her talents to better use: The Brooklynite and her husband, Simon van Kempen, are writing an urban parenting book. First-season viewers of the Bravo show might find it ironic, since her two sons weren’t par ticularly well-behaved, but McCord tells us she’s well- equipped for the job. “It’s not about how to discipline. It’s about things like how to get a passport for an infant when you don’t have a birth certifi cate yet,” she says. “It’s gonna be fun.”