text msg sent notification sound

[simple8888]

i've been searching for a while now and cannot find the answer. i actually want the message sent notification BUT i do not want the sound associated with it. can someone tell me how to disable the sound?? i unchecked notification under Sounds but that also disables other sounds, for ex., when i get a text msg. So, all i am asking for is how to disable the msg sent sound only...thanks in advance