Most mobile cards aren't strong enough to use an entire gig of VRAM. The reason low end cards have very little VRAM is because that's usually about all they can use. So adding 2 gigs of RAM is just amazing and useless overkill. Even if you get past the one screen you'll never be able to run the game. Sorry.
K waterer. Getting xbox soon so I'll play dead space one way or another.... Thnx