Classic Rogue Sounds effect

guys i just wanna know if is there any addon whos will gimme the old rogues sounds,i dont like the cheap shot and backstab, i just want to change for the old classic rogue effect song

There are .mpq files you can make or download that alter the sound effects, models, or race of whichever thing you're trying to change, but this stuff is against the rules. It doesn't generally give you a real gameplay advantage, but it's a slippery slope as to where the line can be drawn. I've heard stories of people changing mining nodes to flag posts to make them easier to see from a distance, just as an example.