Mark Scrivener
Inspired
Remember that a tone match is nothing more than a specialized EQ.
It won't make your 6 string into a 12 string.
Exactly. Though adding some chorus can get you a 12 string like effect.
Regarding rooms - yes, anytime you are using a microphone, the room is part of the equation, as is the type of microphone and the placement of that microphone. For anyone without sound engineering experience it would be highly beneficial to pay for an hour or two at a professional studio and get a hands on lesson in mic'ing acoustic sources.