Heat oven to 250~. Arrange popcorn on 2 jelly roll pans; sprinkle almonds over popcorn. In small saucepan, melt margarine over low heat; stir in the brown sugar and amaretto. Bring to a boil, stirring occasionally. Boil 3 minutes. Remove from heat. Pour over popcorn; toss until thoroughly coated. Bake at 200~ for 1 hour; spread on foil or wax paper to cool. Store in loosely covered container.