It's a lot easier than it looks in those pics, it's just time consuming.
Also, anyone working in a laptop that doesn't know the screw configurations very well would be well, well served to use the "cardboard method" that most DIY mechanics employ when working on cars: mark up a large piece of cardboard with each step (numbered REALLY helps, as you will end up approaching the same sections of the hardware more than once) and a rough outline, and push the screws through roughly where you pulled them out from. This is essential to me when I work on one of my ibooks, as there are really so many steps, and though a screw may fit somewhere, it doesn't mean it SHOULD be there, and can damage components/boards (not to mention that you then have another section that requires a longer/shorter screw). Just a bit of helpful advice.
Also, anyone working in a laptop that doesn't know the screw configurations very well would be well, well served to use the "cardboard method" that most DIY mechanics employ when working on cars: mark up a large piece of cardboard with each step (numbered REALLY helps, as you will end up approaching the same sections of the hardware more than once) and a rough outline, and push the screws through roughly where you pulled them out from. This is essential to me when I work on one of my ibooks, as there are really so many steps, and though a screw may fit somewhere, it doesn't mean it SHOULD be there, and can damage components/boards (not to mention that you then have another section that requires a longer/shorter screw). Just a bit of helpful advice.