I feel like you spent more time writing this thread then researching your questions.
mp3car boomzbox HD is what I use for radio, a little pricey but its straight plug and play. Its out of stock as of this post but its your best bet just wait for more to come in stock.
Also even if some info is from a year ago 90% of the concept is valid, for example thread may have a older processor/motherboard common sense says to buy a newer one but the concept of how it all works is the same.
For a plug and play solution on your civic for LCD http://store.mp3car.com/Direct_Fit_D..._p/dsh-037.htm