I'm juggling a few other projects right now, GunZ isn't the only thing I do now a days.
It's simple to do but I have to dig up the way 'it was done' in the other server. Basically, I added a copy of the sound and added an option to play that sound. Options menu has to be updated to support this toggle. A bit more than '5 minutes' because I'd have to fiddle with the options UI.