Vehicles and drones in SR4, Confused newb seeks advice and clarity Options

[cx2]

Okay, if you guys don't mind I've a few questions about vehicles in SR4. There are several things which don't seem clear as a new player, and I'd like to put a rigger together. I've lurked on the boards here watching some of the games, and read plenty of fan fiction so I have an idea of the SR world already... But these things just aren't defined in SR4.

First sensors. Cameras especially, although to a lesser significance directional mics, laser mics/rangefinders, motion sensors and other sensors you usually have to point somewhere. How are they mounted? I mean would a camera on a van or drone be in a fixed mount always looking in the same direction? In a mounting that allows it to pan and tilt? Or (importantly for vans) would it represent a network of cameras that can look in just about any direction you need, but possibly with limited view in the tilt range?

Similarly with weapon mounts... Can they alter their aim, or would you have to turn the whole vehicle or drone to aim it? And are they obvious or hidden?

I'm asking because you guys have experience of SR, and you might either have useful views on what the community as a whole uses for these... Or maybe there's something in a previous edition that can be used as a benchmark. It looks like a lot of vehicle modifications were left out of the SR4 core rules, with only the rigger adaptation and ambiguous weapon mount. I'm planning on giving my rigger a van (naturally), but want more than a simple fixed forward view from the cameras, if only another camera or two facing to the rear and a motion sensor on either side to cover the doors.