Replace laptop video card?

[shadow29]

I recently purchased a Dell 6000 laptop.

Thinking that I would save some money, I didn't upgrade the onboard video card.

Sadly, this video card is not very good. Can I replace this card? Could you recommend a video card with which I can replace it? I don't need an ultra-gaming video card, but I'd like to run GTA without any lagging (I assume that this is the video card, since I have 2 gigs of RAM).

Thanks.