@CaptainISO: you may also wanna take a look
here there are links and guides in using them.
just did some comparisons regarding the PC version of DC2 and the PSX shader versions, here they are.
the first one is the pc version and the second one is the PSX version using NV shader at max, the pc version lacked framebuffer effects so its crispier and a bit more hi res, also the textures/polygons are not "twitchy" or wobbling (forgot what hardware feature is that, also i enabled 4X AA but it seems that FRAPS wasnt able to capture it). The PSX version adds some framebuffer effects such as the motion blur so the scene looks a bit blurry, but the colors are more vibrant looking and more anti-aliased/smoothed edges using NV Shader.
The rest are the IQ comparison.
3rd pic: PC version
4th pic: PSX version using NV shader
5th pic: PSX version using Bump map shader
6th pic: PSX version using cartoon shader