I don't know if this is a VT thing or a zonasnap thing, but I set the Mute button to launch zonasnap, but when it launches, it takes me to my "Media folder" and takes the pic of that, instead of what I want it to.
However, when I re-set it to my left convenience key, it works.
I wanted it to by my Mute button so that I could stop accidentally taking pics of things.
Looks like a default? Pressing Mute will open the Media folder and then do the action you want it to? I have an 8520, btw, so my berry has the media buttons at the top.