This is just a sound replacement for the noisy Deathknight mount. The default is great the first 100 times but right around the 101st it may make you want to blow your brains out.
This replaces the horrible squeal with a few notes of the William Tell overture. Any fan of looney toons or old movies will recognize it. It's the trumpet fanfare you always hear at the beginning of a charge!
DIRECTIONS:
This does not install like a normal Addon. Unzip it into your DATA folder instead of your ADDONS folder. The final path should look like this on a pc:
C:\Program Files\World of Warcraft\Data\Sound\Spells\DeathKnight_SummonWarHorse_Impact_Base.wav
Enjoy!