In terms of the units required to watch DVDs while in motion and hooking up TV tuners... how difficult are these to install? Is this something anyone can do, or do these require some experience in radio/etc installation?

I'd love to install anything that will allow DVDs to play while the car is in motion, but I'm hesitant without having knowledge on hooking any of these things up.

Thanks -

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CURRENT: 2008 BMW X5 4.8 ~ 2007 Porsche 911 Turbo ~ 2008 Range Rover

PAST: 2008 Lexus GX470, 2008 Audi S6, 2007 BMW M5, 2007 Chevrolet Tahoe LTZ, 2007 Porsche 911 4S Cabriolet, 2007 Audi Q7 4.2, 2006 Range Rover Sport Supercharged, 2006 Lexus RX330, 2005 BMW X5 4.4, 2000 Audi S4, 1999 and 2000 Jeep Grand Cherokee Overland, 1999 Porsche Boxter S and others from the older days.