can the gfx be updated?

[TheCenturion]

My mate recently bought a laptop, he wanted to play games. so i told him to make sure to buy one with a standalone gpu, but the one he bought has a "sgi graphics accelerator" or something, also, don't know what the mobo is, cpu-z won't tell me. Is it possible to put a proper gfx card in there for him to play his games? also can you buy a laptop gpu, cos i've never seen them sold alone

 

[TheCenturion]

it's the brand advent, his grandparents didn't want to spend over £400 and it was £350. i told him he wouldn't be able to game at that budget very well

 

[TheCenturion]

so it's the worst choice in terms of graphics? nothing could be worse? with 2gb of ram and a 1.83ghz dual core, could he play cod 4 on low?