As of this week, Deadly Boss Mods has this same feature, so if you use DBM you don't need this anymore!
This is a trivial little mod to warn for the Disrupting Shout cast by the huge skeletons in Icecrown Citadel trash. (It's an AE 8-second interrupt.) When I made it, no boss mod warned of it, and I really wanted a warning since it's pretty annoying. The warning gives a caption, as well as this sound:
/run PlaySoundFile("Sound\\Doodad\\SimonGame_SmallRedTree.wav")
It will play even when sounds are off.