Graphic Card does not support Vertex Shaders.

[hky]

I bought the Humble Indie Bundle and went to play it but it won't work.

GraphicCard: mobile intel ®45 Express chipset family (microsoft corp - WDDM1.1) [I think?]

Miscellaneous:

I tried playing Penumbra and it says my GraphicCard does not support Vertex Shaders.

Is there any way where I could turn of this vertex shaders thing or at least to make this game work? Cause it'll be a loss not to be able to play this.