Arduino Serial Communication over rx and tx pin ( pins 0 and 1 )

hey..thats something similar to what im trying to do here http://arduino.cc/forum/index.php/topic,54190.0.html .. tried burning the atmega8 hex files on a seperate atmega8.. but i think i screwed up in the lock bits part.. and im not sure if i can burn a atmega168 hex file to an atmega8.im looking for a good tutorial to guide me to burn the RIGHT arduino boot hex file to an atmega8.. with the right lock and fuse bits using avr studio..
Thanks..