I recently switched from an old PC desktop to one of the new 15" powerbooks (yay.. ), and everything is going quite well, but I'd like to change the noise made when I change the volume (from the little farting noise to something like the purring noise). Is this something that can be done? I feel like one of my friends who has an older TiBook and 10.1.x running can do this. Is this something that would have to be done with a firmware hack? And one further question, any particular things that make things better using OS X from people who are used to using it (quite a sentence).