My mom currently drives this car, but in about 3 months I will be getting it. When I do I will be using it and I only see fit to a car computer because I am the BIGGEST computer geek at my school (and I would like something to brag about). I plan on using the guide from
https://www.timekiller.org/carpc/. The things I don’t know about are how exactly I should get power from the battery. And if it gets too complex I think I may have my local body shop install it for me. The second problem is that I have no clue where to install the PC.

As you can see I have limited space in the front so I plan on using the XENARC 700IDT™
7" IN-DASH LCD Monitor w/ VGA & Touch Screen so it will fit in the center compactly and look like factory. Places I think I may be able to install the Computer are under the passenger seat (easy ?obdII? connection and fairly easy access) The other location I can think of offhand to install the PC would be the trunk

The reason I would want to install it by the spare tire is so it looks more "factoryish" and so I have full use of the trunk. The last idea I had was to install it in the glove box

Any warnings, suggestions, or a general hardware how-to would greatly appreciated