@eclipse : i know how to make start here robot, i have also made some line followers , object chasers and LED sequnce. (using ATmega16, AT89S52, and sensors like qrd1114) . the problem with that car is that i don’t know much about gps and connecting it with your microcontrollers, also image processing. if anyone can give some useful info or links i will be very thankful.
Servo magazine ran at least one article on reading and parsing data from gps receivers. I am sure there are other resources that will offer similar information.