XT Mute is a sound file replacement for those that are tired of hearing Lil' XT wherever they go.
To install, unzip this archive into your WoW installation folder. After extraction, a Sound folder should appear with the proper paths and file names to override the respective sound files in the MPQ archives. The replacement files themselves are empty, they contain no data for sound and are only a placeholder.
Note: Since Lil' XT uses the same sound files as XT-002 in Ulduar, the raid boss will also be muted.