To fix the Pixel Shader 3.0 error on Windows 10 64-bit, you don't need a "repack." You simply need to and update your GPU drivers . Once those libraries are in place, your modern PC will handle those old-school shaders with ease.
If you're unable to install Pixel Shader 3.0 or prefer not to use it, there are alternative graphics technologies available, such as: Pixel Shader 3.0 Download Windows 10 64 Bit REPACK