It"s impossible to walk the streets of New York and not wonder what"s behind the windows and doors of the city"s panoply of residential buildings. Whether it"s a breathtaking penthouse on Fifth Avenue or an inconspicuous garden apartment in the East Village, an artist"s loft in SoHo or a private house tucked away on a quiet corner - New Yorkers know how to make their spaces both livablee and imaginative, both functional and spectacular.