How can I install a new Video card on my laptop?

Hey I want to play game on my laptop but I cant because my video/graphic card suck. How can I change my Graphic card? If u have any suggestion of video card please tell it to me.



Laptop spec (maybe usefull) :

CPU : Intel(R) Core(TM)2 Duo CPU T6400 @ 2.00GHz

CPU Speed : 1.99 GHz Performance Rated at: 3.2835 GHz

RAM : 3.9 GB

OS : Windows 7

Current Video Card : Mobile Intel(R) 4 Series Express Chipset Family

Sound Card : IDT High Definition Audio CODEC



PS:Sorry if my english is bad. Its not my first language :)



ThanksHow can I install a new Video card on my laptop?
Can't change it in a laptop