The rice paper will serve as a kind of "mat" for the shrimp mixture, and will also add to the exquisite taste of this appetizer. Continue in the same way, adding small pieces of rice paper to the crackers until you have 15-20 crackers covered with rice paper.
Note: You will soon see why the rice paper is necessary in this recipe. If you try to add the shrimp mixture without it, you'll find the "wetness" of the shrimp will seem to "burn" a hole right through the cracker!
This effect also happens on your tongue, so that when you eat these crackers, they feel like they are melting in your mouth - which they are! That's what makes them so fun to eat.