It seems your model comes with 2 choices: Intel's integrated
3100 graphic or Nvidia GeForce Go 8400 (128MB VRAM).
If it's GeForce, I say have you tried it on the lowest setting
available for the games? Most importantly, you will have to turn
off shadow. Turning off shadow helps improve graphic performance
alot.
If it's Intel's integrated graphic, sorry boy, your laptop ain't
made for the more "intense" gaming. Do take comfortable that you
can play still play some light games like Maplestory, flash games,
Maplestory and flash games (Pun intended).
Btw, 4GB ram very big meh? It can't do shit for gaming if your
graphic card sucks and you are only able to utilise it up to 3GB
max for 32-bit Windows OS. 