Salut Cronos!
Désolé, mais je dois suivre la loi de la majorité...*
When it comes to sound editing, all sounds are stored separately as .mp3 files in the WinSPMBT\Game Data\Sounds folder. There is also a "sounds.ini" file which says which sound file is assigned which number in MOBhack.
With the right software you can edit these sounds, create or import your own (by directly replacing the files), and by
carefully tweaking the ini file you can also swap some sounds or add your wn without deleting the original.
There were several threads about this already, only I cannot find them again. I think that someone even made a reference list about what sound represents what, but you'll have to check this around. Just browse through the forum for anything with "sound" in it for more info.
Bye!
*Was: "Sorry, but I have to follow the rule of the majority"!