Acer laptops Geforce graphics cards on acer laptops?

I have a acer aspire 5630 laptop currently installed is a intel 945 express chipset family graphics card and my operating system is Windows vista home premium 32-bit.

I was wondering can i put a Geforce graphics card in my laptop my self or will i have to see the techguys in pcworld for that part and if so which one would be best for me??

p.s. i play world of warcraft a bit so one which could handle that would be good

(yes im a kid :biggrin: )