W910 sounds

Hi there its my first time in this forum but i've been following for a while now

Today I've got my w910 and its great the only thing im complaining is the "alert sounds" like when it has no juice the warning popup alert sound plays, or mainly (in my case) when you sync with your pc, every steps that annoying sound comes up

I was looking in settings and nothing there, even if you set your mobile in meeting and change everything to off that sound plays...

Then i had a idea to look for the sound file on the places i can reach like media folders and easy access places like that, inside the media card or folder no success so here I am wondering if its a firmware mod that i need...

Is it anyone out there that could help me please???

please be patience i don't know much about mobiles hacks...

All the best, Beto