Cut tortillas to form a 6-inch square and warm in microwave until just softened. Spread whipped cream cheese in a thin layer over the entire tortilla. Spoon cooked rice over half of the tortilla and place crab meat, avocado, green onion, green pepper, cilantro and lemon juice and spoon this mixture lenghtwise over the rice. Roll up tightly, jelly roll style. Refrigerate for at least 30 minutes. Cut into 1-inch pieces and lay them flat on a 13"x9" pan. Store in refrigerator until serving time. Drizzle with sour cream mixed with Tabasco sauce and serve.