Place some warm water in a shallow dish. Dip each spring roll wrapper in warm water; place between damp paper towels for 10 minutes.
Meanwhile, for filling, in a large bowl combine shrimp, lettuce, carrots, green onions, and cilantro. Add 2 tablespoons of the peanut dipping sauce and 1 tablespoon of the rice vinegar. Toss to coat.
For the dipping sauce, in a small bowl stir together the remaining 3 tablespoons peanut sauce and 1 tablespoon rice vinegar; set aside.
Place about 1/2 cup of the filling about 1/2 inch from the bottom edge of 1 of the moistened spring roll wrappers. Fold the bottom edge of the wrapper over the filling. Fold in sides. Roll up. Repeat with remaining filling and spring roll wrappers. Cut in half; serve with dipping sauce. Makes 4 servings (8 rolls).