yup all u need is just the power supply- mother board - ram - and hard drive... cd drive is not necessary...A) The PC's nature :
Can you just take an office PC, striped of some things ( i mean stuff like a modem) can function with a problem in a car. or are there modifications that we need to make it stable.)
basicly u can get a inverter and wire it up... easiest way i guess... or u can get a dc-dc power supply does not need a inverterB) How does the power in a car work : I know that most things in are powered off the car battery. but about the voltage, I am completely blank about how excatly are they powered.
not really just dont run it when ur engine is off because that way it drains the battery... the alternator (in ur case maybe a generator) keeps the battery charged...C) Does a car-pc effect the life of the car : I have a hybrid, and i am loving every moment of this 2003 Honda Civic hybrid. would be like it might effect the performance of the car.
hope that helped! good luck and have fun!
by the way where are u from? india?