but it may cost you your computer.
Nobody here will ever recommend that method since your forcing the game to run on hardware that wasn't made for the job. You can overstress the chip and other components and it could overheat and cause serious damage.
It's also unreliable. You may find it running fine now, but when things get busy you may get slowdown and crases as well as extra system stress.
Don't play for long periods, watch the heat levels and don't have the graphics set too high. Beyond that your performence may come down to luck.
edit:Also be wary about downloading files like that from unknown sources.