Hey Ashley :)
I already tried that method but, actually, there 3 differents formats for ONE single sound. (Wav, OGG and MP4 if I remember)
So I have to manually convert the Wav file into the other formats because just replacing the wav is not enough. (tell me if I'm wrong)
So this is definitely not a method I will use.
May be using PLAY by name is a temporary acceptable solution but pleeeaasseee, can you add a REPLACE sound file feature ??!!!! http://bit.ly/yv8egg
By the way, thanx to all of you for your answers! :)