I just double-checked, and yes, it's definitely installed correctly. The launcher that was bundled with the mod comes up when I start the game, and I have DX10 selected as the renderer. All the files are in the correct folders.

I even reinstalled the game in a separate location so I could directly compare it with and without the mod. I just don't see a big difference. I notice that textures are sharper, but that's about it. I think I'm simply a victim of my own expectations though.. I was expecting to see new lighting effects and such.

*Edit* I don't actually need to install DX10 right? I assume those files would be present in DX11.