Ok, to fix this open up the material editor and select a object then click on "Get Renegade Material", after that look under Pass 1 and make sure the colors are like this:
Ambient -> WHITE
Diffuse -> WHITE
Specular -> BLACK
Emissive -> BLACK
The two that are white can be changed to any color for the housecolors, then in W3D viewer they will be that color. Also note that you must do this for all objects, and you might also need to add the texutre under Textures and then Stage 0 Texture.
Sorry I can't take pics, I'm in a hurry

Hope this helps! Otherwise I'll try to get some pics..