hi, I have a intel core duo imac, with 10.4.8 on it... i want to reinstall osx to start it from fresh. but im having a problem. i have lost the install disc i got with my mac, so i borrowed my dads, from his intel core 2 duo imac. its a 10.4.7 instal dics 1 and 2. should work fine eh? well when i put disc 1 in, it start up, and when it gets the the install window, it just says software cannot be installed on this computer. i had the feeling it was to do with firmware. but i tried that firmware reconstruction cd thing, with no luck! any ideas? Joel. thanks!