Hey can anyone lend their expertise on this-? I have a powermac g4 AGP (single 450mhz processor). will this computer support dual processors, such as a dual 500mhz? If so, which processors from which computer model(s) can i use? like can i put a dual 500 from a Gigabit Ethernet mac in the AGP mac? please help thanks oh (heh heh) and is there such thing as 512mb PC100 ram?