I am just looking for a script/addon that plays the "raidwarning" sound upon quest completion only, there is some out there that do it on progress as well but I really only want it on completion... and not the like of quest guru etc, dont need the rest of the stuff..
You could just set the "progress" sound to something silent.
"You'd be surprised how many people violate this simple principle every day of their lives and try to fit square pegs into round holes, ignoring the clear reality that Things Are As They Are." -Benjamin Hoff, The Tao of Pooh
You could try and modify a mod like PeonQuestComplete to play a sound of your choice. It uses sounds built into the wow client and I'm guessing you could just modify the .ogg sounds in the lua file to point to one you'd rather hear.