What Graphics card to get for gaming?

[Matt D]

I play COD4 and need a new graphics card but dont know a lot about them. could someone recomend me one please
heres my rig:
Laptop
Manufacturer: DIXONSXP
Processor: Intel(R) Celeron(R) CPU 530 @ 1.73GHz, ~1.7GHz
Memory: 1526MB RAM
Hard Drive: 72 GB
Video Card: Mobile Intel(R) 965 Express Chipset Family
Monitor: Generic PnP Monitor
Sound Card: Speakers
Operating System: Windows Vista™ Home Basic (6.0, Build 6000) (6000.vista_gdr.071023


yeah i know its bad but when i bought it i didnt think i would use it for gaming