YES! there is
a) it can be done, but from what i can tell it's not a touchscreen, and anything with VGA will give you a better resolution.
b) it can be done as well. The PS2 has an internal power supply which takes 120 volts AC and turns it to about 12 volts DC. so it jut means you'll have to crack open your PS2 and change some stuff. (sounds like fun for a newbie) The gamecube, i just thought i'd point out, has an EXTERNAL power supply, so no hacking is nessecary to put it in a car