hi there, i really really need your help people!!! so i started up my computer today and the keyboard and mouse wont work. i tried all the remedies to make them work and some have said reinstalling mac os dvd's solved the problem..... however without any keyboard or mouse how do install them? i put the os dvd in the computer but i cant click or do anything to make it start so how i do install the os dvd's in this case..... and oh btw... even in safe mode the keyboard neither the mouse work.... i have a 20" iMac desktop that is about a year old if it helps and im using a wired mouse and keyboard. please, please help me!!! your help is appreciated.... thanks a bunch.