Heat oven to 400°F. In large bowl, combine cheese, 1/2 cup bread crumbs, crabmeat, 3 tablespoons of the chiles, taco seasoning mix and eggs; mix well. Sprinkle each flounder fillet with lemon juice. Spread crabmeat mixture over each fillet. Roll up each. Place in ungreased 12x8-inch (2-quart) glass baking dish.
In small bowl, combine salsa and water; mix well. Spoon over rolled fish. Sprinkle with remaining chiles and 1 tablespoon bread crumbs. If desired, sprinkle with additional cheese.
Bake at 400°F. for 20 to 30 minutes or until fish flakes easily with fork.