google image search turns up a few pics of standing in front of c+'s with settings clearly in view
just for what its worth, regarding the whole c+ metallica tone thing, I've been a metallica super fan from 91 to now. I was a tape trader for years and had a collection of almost 500 metallica bootlegs at one point. Its been beaten into my brain what metallicas tone sounds like through all sorts of different venues soundboards and audience tape recorders.
i've tried some of the "puppets" settings with my c+ 105/DGR 15" and gibson stock v recently, and i've found that if you follow those settings, and play the songs with the same accents and tonal inflections an old school metallica fan should have in his fingers, you can really get close enough to the point where your imagination kind of has to take you the rest of the way. you gotta figure they had micheal wagners expertise, the rare trident board pre amps, and various other studio tactics in between. If you've ever been in a band and heard "your tone" in the control room, and then heard it through a nice board, and onto tape, you'll know...
My point is, don't get too obsessed with sounded "just like" anything . If you have a c+, every control on that amp is so sensitive, that you can really sound like anything if you know what you're doing.