Im looking for a video card for my Laptop?

I have a Hp Pavilion dv2000 series laptop. It plays Dvds and games no problem.... but it has a little bit of lag when Playing World of Warcraft I thinking about upgrading the Video Card. BestBuy has informed me that it is difficult to upgrade a Video Card on a Laptop, they mentioned buying a PCMPIA Card.... but I havent found any on a yahoo search..... any suggestions?|||Your laptop has onboard video. It cant be changed! There is no card!|||I haven't ever seen a PCMCIA video card for a laptop....you may consider upgrading the RAM and dedicating more of your RAM to video display instead.