Heat oven to 350°F. In large bowl, beat together margarine and sugars with electric mixer until creamy. Add eggs and vanilla; beat well. In medium bowl, combine flour, baking soda, cinnamon and salt; mix well. Add to margarine mixture; mix well. Stir in oats and raisins; mix well. Drop by rounded tablespoonfuls onto ungreased cookie sheets. Bake 10 to 12 minutes or until light golden brown. Cool 1 minute on cookie sheets; remove to wire rack. Cool completely. Store tightly covered. To make sandwiches, spread softened ice cream on bottom side of one cookie; top with second cookie. Wrap airtight; freeze.