I'm on an old Macbook White, the one with the Built-in GMA X3100 graphics card, and I was wondering, is there anyway to install another graphics card over it? I know it's irreplaceable, seeing as it's built in, but I heard that on old dell notebooks, it's possible to install a new graphics card over the old built in one; is there any way to do that on this macbook (even if it means taking apart the frame and exposing the motherboard)?