Dumbie question, I know. But what is a dual processor upgrade? For that matter, what is a dual processor? i understand there are two processors, what I don't understand is why -- and more importantly, why is this better for editing? Sorry so dumb. I just don't understand it nor do I understand why it might be a faster machine -- say the Powermac G4 Digital Audio Dual 533mhz -- why this is faster than the Powermac G4 Digital Audio 733mhz. Do the processors run independently or sort of in tangent and speed bumps occur that way?