with laptops that werent originally built for games, theres not a chance of getting them to run them good.
ALOT of a computer's gaming ability comes from the graphics adapter. The Intel 950 Integrated graphics adapter on your laptop simply isn't made to handle the demand of modern games. Integrated adapters like the 950 have issues running some games due to lack of driver support for certain graphics engines, and a far more proprietary hardware setup. Not to mention the 950 is only equivalent to one of the lowest forms of the NVidia GeForce 6X00 series cards, which are VASTLY outdated now.
The 950 also wont have a hope of supporting DirectX 10, which is supported on all modern video cards, and is likely to become the new standard in the near-ish future.
In short, sorry to say it, but your laptop is pretty outdated. You might be able to play some games on it, but dont expect them to look nice at all, as you'll have to turn the graphics options down to minimum just to make them playable.
EDIT: Forgot to mention that its not possible to replace the graphics adapter on a laptop. As they are built in to the motherboard.