It's actually in my 350Z, but for those of you interested, it may spark some ideas.
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Part 1: Headunit & XM Radio
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Part 2: Speakers
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Part 3: Amps/Amp Rack/Fiberglassed Sub Enclosure
The issues include over 100 pictures, and DETAILED how-to's for installing all of the above things. So, even if you aren't trying to fiberglass a system in your car, but just want to learn how to install a headunit or speakers, read the issues!
Anyways, check them out, and let me know your thoughts.