This paper presents a multi-objective optimization method which is an alternative solution for multicast networks load balancing, using a software implementation of the Simulated Annealing heuristic. The method minimize four basic parameters necessaries for guarantee the quality of service (QoS) in multicast transmissions, these are: end-to-end delay, maximum link utilization, bandwidth consumption and hop count. The results obtained by the heuristic will be compared with the results hurtled by the mathematical pattern proposed in previous investigations.