I have a MacBook pro retina with NVidia 650m and 4gigs ram. I know the ram is soldered in, im not sure about the graphics card.... but I wanted to know if money was not an issue and you walked into the apple store and purchased a brand new MacBook pro retina/parts could you theoretically swap the processor and graphics card into your older retina plug and play? or is it more complicated? what else would have to be done? what are the parts involved?