En que lista has visto que el Atmega8 es compatible? Porque yo no lo he visto ni en la primera página de aquí, ni en la primera del hilo oficial de ps3hax.
He encontrado esto googleando.
Lista de los chips soportados
Clásico
AT90S1200, AT90S2313, AT90S2333, AT90S2343, AT90S4414, AT90S4433,
AT90S4434, AT90S8515, AT90S8535, AT90S/LS2323, AT90S/LS2343,
AT90S/LS2333, AT90S/LS4433, AT90S/LS4434, AT90S/LS8535
Diminuto
ATtiny10, ATTINY12, ATtiny13, ATtiny15, ATTINY2313, ATtiny24, ATtiny25, ATTINY26, ATtiny44, ATtiny45, ATtiny84, ATtiny85, ATtiny261, ATtiny461, ATtiny861
Mega
Atmega8, ATMEGA16, ATMEGA32, ATMEGA48, ATMEGA64, ATmega88, ATmega103, ATmega128, ATMEGA1280, ATmega1281, ATmega161, ATMEGA162, ATMEGA163, ATmega164, ATmega168, ATmega169, ATmega324, ATmega329, ATmega3290, ATmega640, ATmega649, ATmega6490, ATMEGA8515, ATMEGA8535
Otro
AT90CAN128, AT90PWM2, AT90PWM2B, AT90PWM3, AT90PWM3B, T90USB646, AT90USB647, AT90USB1286, AT90USB1287