Don't use a video plugin that requires pixel shaders if your card doesn't support them. Try Jabo's DX8 or DX9 if you're on a windows machine, if not maybe try gln64, or another OpenGL plugin.
Rice Daedalus has a OpenGl core. My favorite is http://gln64.emulation64.com/, but it doesn't always work best on low end machines. Jabo's DX ones do though.