Finely roll 30 cookies; coarsely chop 20 cookies.
In bowl, combine finely rolled cookie crumbs and margarine.
Press on bottom and 2 inches up side of 9-inch spring form pan; set aside.
With mixer, beat cream cheese and sugar until creamy; blend in eggs, sour cream and vanilla extract; fold in chopped cookies. Spread mixture into prepared crust. Bake at 350 degrees F for 60 minutes or until set.
Cool on wire rack; chill at least 4 hours. Halve remaining cookies; remove side of pan. Garnish with whipped cream and cookie halves.