1) Enable OpenGL Video Mode 2) Enable GLSL in OpenGL options 3) Select the Shader 4) Play a game
You'll need a really powerful PC and a good video card with OpenGL 2.0 support for enjoy the experience.... My old Quad-Core with an economic video card is not able to play at full speed Black Tiger though...
My hope is that someone interested will provide some less demanding-resources shaders... I know there are some also in MAME source code stored in folder called "shader". I don't recall the correct path at the moment.