Thanks for those who answer me.
Do you think there can be found someware some sets of free sounds for useing in games (sounds like a door closed, a braking window, etc, etc) ?
Lots of sites which have sounds you can grab free sounds. Do a "Google" on "Free Sound Effects" and you'll find tons of sites.
Here's a couple to get you started:
http://www.echovibes.com/
http://www.a1freesoundeffects.com/noflash.htm
http://www.stonewashed.net/sfx.html
Thank you !
thanx from me too, I find it hard to find stuff like that. :D
The Newgrounds audio portal has music you can use, i think its free as long as you give credit to the maker.