first I started with a kenwood HU. And no its very easy to install you just have to rip out a k-wire (diagnositc wire) and one other. Then just use a wiring harness and antenna adapter.
Then I got the dvd for entertainment purposes. Yes its in the trunk.
THEN my friend told me about mini car computers and after a few hundred dollars here I am. =)
I know its overkill HU, dvd, and comp..but oh well.
I want to get a usb tv tuner next.