i haven't cracked mine open yet but i have something you could try to dampen it a little. there are places where u can buy sound dampening material (usually for cars/car doors) that i think is made of viynal (sp) or asphalt (shit u not). i think you can get it pretty thin too so if u open it up u can a) put is outside the sheilding between the case or

inside around the dvd drive. again it may not fit as i havn't opened it and even if u do there may be some sound leakage throught the front and back of the drive.