Absolutely, but you'll need a few things first.
1. What is the fastest CPU your laptop will hold? This is usually available on the vendor's site.
2. A shop manual, with pictures, also available from the vendor. An email to tech support should get you a .pdf with what you need to know to disassemble/reassemble properly.
3. Is your current CPU heatsink large enough?
Laptops are strange beasts and they are all different. The screws never do what you think they'll do. To change the CPU in my Asus, I need to remove the keyboard! You should also be very good with your hands, small screws and patience.
I would think that by the time you figure in the cost for the new CPU you might be better off getting a new machine or just maxing out the RAM on the one you have. That will have the most effect on speed.
I've looked at your machine and it seems it is only offered with a Celeron M, the difference between the slowest and fastest Celeron M will not be worth the cost or trouble, not to mention you might destroy the laptop accidentally during the process.
Tony