It is possible to upgrade the CPU on some laptops, but you'll need to hunt down a specific mobile processor for it. Laptops are far more picky than desktop PCs about such upgrades. It's a fiddly process, and depends on a couple of factors: whether the CPU is fixed to the chipset with adhesive or had the pin welded to the socket, and whether it's accessible and can therefore be removed and replaced. I don;t think the processor you selected id compatible tho.
Laptops are created on jigs (special frames) that ensure all parts fit snugly and correctly each time one is created. Manually opening up a laptop and doing anything more technical than swapping hard drives or adding more RAM isn't the easiest of processes and will almost certainly invalidate your warranty.