Place chocolate pieces in a small heavy saucepan over low heat; stir constantly till chocolate is almost melted. Remove from heat and stir till smooth. With a small paintbrush, brush chocolate onto bottom and sides of paper candy cups till chocolate is 1/8 inch thick. Wipe off any chocolate that runs over top. Chill till firm. Pull paper cup away. Store in refrigerator.
In a small saucepan combine marshmallows and liqueurs. Cook over low heat till marshmallows melt, stirring occasionally. Remove from heat. Cool 10 minutes, stirring frequently.
In chilled bowl beat cream till soft peaks form. Fold marshmallow mixture into whipped cream. Spoon into chocolate cups. Garnish with chocolate curls. Chill 4 hours or freeze. Serve frozen or chilled. Makes 16