What AMD processors will work with a Toshiba Satellite C655D Laptop?

Good news: Found NFS Hot Pursuit for 70% off via PC download on Amazon. $15 is an effin’ steal.

Bad: I don’t have the computer to do it. Not even a tower, just laptops. The one I’m using now has enough memory and a good enough mobile graphics card, but, because my parents are cheapskates and MUST have the $350 computer on sale, I’ve unrealizingly wound up with an AMD Sempron (gasp) processor.

According to a repair manual I looked up online, this computer also came available with an Athlon II processor. However, I was wondering if it could handle a better processor, like a Phenom x2 or x4, or greater (yeah, right).

I think I’ll be sending this to a shop to swap processors; or if it’s more than triple what it would cost me to get one from Newegg and put in myself, I’ve found the repair guide online already and think I can handle it.