Thanks for your answer. I was thinking on this solution.But the splice can be more difficult, if the characters moving or lifting(etc,etc) while they are talking with each other. Anyway the splice can take more time.Not impossible to do this solution but can be too sticky.And can be nerve-racking. But I shall check that if there is a plugin or something else to do a multiple talking.Just untill now I did not find any "multiple talking".

Have a nice day guys.