GTX v 1.5 (beta) for Doom3 or Quake4
GTX v 1.5 (beta) brings your Doom3 or Quake4 to the next generation quality. New shaders, new particles, new specular, new lightning, high resolution textures, reskinned monsters. Its 100% guaranteed that you are gonna shit your pants once more. Just like when you played Doom3 for the frist time.
Link: Not icluded search ModDB for yourself lazy bastards :P
Also avaible at FileFront.