I regret to inform you that the 9300m is not a very capable 3d graphics card. That 8800 CPU is very nice, and for 2d acceleration the GPU is just fine. But it's the 2nd digit of a GPU designation that is more important with regard to 3d processing, and a 300 card isn't gonna really FPS very well.

To maximize what you have, always turn off anti aliasing / anisotropic filtering and try running with no shadows and lower detailed models. Fortunately your native resolution is lowish at 13" so it will be sharp, if not detailed.

AA/AF off is your first step. If you still get bad fps, you can try running in DX8. There are guides for that online someplace.