VR rigging & some vehicle stuff, Stuff in SR4 that doesn't make sense. Options

[Narse]

To preface I have the corrected 3rd printing of SR4 and no SR gaming experience. However I have noticed some stuff in SR4 that doesn't quite make sense by itself.

First: What the heck do riggers roll for Vehicle tests while 'Jumped into' drones? The description of the vehicle skills and vehicle tests only mention Response + Appropreate Vehicle Skill +/- Handeling. However last time I checked Response is a physical attribute and it doesn't make any sense to me to have someone in Full VR to be using a physical attribute to interact with a matrix entity (the drone). In some circumstances it would make sense for characters who are NOT 'jumped into' a drone or vehicle but are controlling it through the matrix to use Command Program + Skill. But under the rigging section it does say that the the rigger operates a drone "as if it were his own body." and that "Any tests are made using the rigger's own skill and attributes". This makes sense as far as mental skills and atributes are conserned, but not for physical skills/atributes, where the rigger is supposed to be using one body (the drone) but would be rolling the atributes of his other body (meat bod). Besides vehicle skills Gunnery is linked to agility which makes even less sense to be using in VR. Does this mean that riggers are forced to use sensor aided gunnery (where sensor replaces the attribute used)?

Second: Despite the fact that all drones and vehicles seem to be matrix nodes none of their matrix stats are given except pilot (which functions as system). Am I to assume that they use device ratings unless upgraded?

Third: What exactly does the command program do? / How exactly does it work in game terms? on p.226 under the program description it says it lets you controll a device through the matrix e.g. a drone(see p.238) or an agent. On p. 238 under Controlling Drones there is no mention of the command program. But it does say "See Issuing Commands, p.221 for details on instructing drones." On p. 221 under Issuing Commands it says "you can issue commands to an agent, drone (p.238) or sprite with a Simple action. Note that you can issue the same command to multiple agents, drones or sprites with the same acion..." Once again no mention of the command Program. However, right before that on p.220 under Controlling Devices it does say that "Remotely controlling a drone would take a Command + vehicle skill test..." But this seams to be more physical controll rather than issuing a command. Anyways I'm really confused about how this is supposed to work.

Fourth: Are vehicle weapon mounts concealable/hidden or can anyone tell that your van has an Ingram White Knight mounted in a turret on top. (Could be interesting trying to drive that into a high security district.)

Fifth: How big are drones? How big are Large drones? Medium drones? small drones? Specifically, can I fit a Steel Lynx into my van? I think size is somehow related to body but I'm not sure.

Also on an unrelated note: if, as it says under THE DATATRAIL and under Spoofing the Datatrail, every wireless/wired device has an access ID assigned by the manufacturer and most nodes refuse acces to unidentified devices, then how do technomancers acces any nodes? They don't have a serial # do they? So won't they be denied access to almost every node?