So I should be inheriting a g4 tower sometime soon. I'm curious as to what it takes to upgrade this thing to make it far better than it is. I'm not exactly sure what's in it now, but I bet it's less than 500mb of ram and a smallish hard drive. I have a G5 here at work with dual 2.3ghz processors and 1gb of ram but I like this machine alot. What does it take to get the G4 to this capability. How difficult is it to replace the parts I would need to? Where do I go to buy these parts? Ebay?