Laptop Processor help

Here is a list of the specs on my laptop. I was wondering if I should get a new processor first if I were to upgrade anything. It seems to be able to run games, they just get slowed down and the framerate will drop. If a processor is a good idea, what type would fit my laptop? It is the 17in Hp case so it has the number pad and bluray player. Thanks for any help.Manufacturer: Hewlett-PackardProcessor: Intel(R) Core(TM)2 Duo CPU T5550 @ 1.83 GHz (2 CPUs) Memory: 4094 MB RAMHard Drive: 306 GBVideo Card: NVIDIA GeForce 8600M GS