The above won't work and will reset to default after a soft reset or a profile change (at least on my device). To effectively remove that annoying @$$ beep, 1st copy the original file from your device and copy it to the desktop, rename it to sometheing like original-filename1, create a silent wave file and name it to whatever the default beep was named, copy it to the windows folder along w/ the renamed original file incase you want to revert back for some reason. A soft reset may be required. The change was applied on the fly on my device. No soft reset was required.
"You can get more with a kind word and a gun than you can with a kind word alone." – Al Capone