Either purchase a prepared chocolate wafer pie crust, or make one: Crush one package chocolate wafer cookies into fine crumbs, mix with 1/3 cup melted margarine, and press all but three tablespoons of the crumb mixture into a ten-inch pie plate.
To make the filling: Combine the orange jello, boiling water, sugar, orange juice and orange rind (freshly grated, not dried), stirring until the sugar crystals are dissolved.
Chill in a bowl until this reaches a soft jelly-like consistency.
Whip the chilled evaporated milk (a small tin, 160 mL in size, not the big one) until it becomes light and frothy.
Fold this into the jello mixture along with the liqueur.
Pour into the pie shell, and sprinkle with reserved crumbs, if available.
Chill for one to two hours before serving.
This lets the pie set and you'll be able to cut it into slices.