Scenefixer can fix that with no problems as long as none of the connecting nodes in the shader show dashed lines. However, I have found that the default shaders are lacking and don't really do justice to V4. For that matter, I have seen vendors that used the diffuse blue and red ambient color chips in their shaders with textures that just simply do not render right, especially those that change the tonality or completely compensate for a very bad texture color.