More Tweaks

In an attempt to fix some issues with extremely low performance (2-6fps) on some machines running Windows Vista with certain graphics hardware (nVidia 6100GO chipset graphics), I've been conducting some tests with a member of the forums who is experiencing these issues and I've been tweaking some of the rendering and DirectX code and am also adding some advanced settings that will hopefully help people set up the game in a way that runs optimally on their system: