Render Mesh-Boxes? (d3d_lines)

Hi all,

I want to render a wireframe of a specific model (terrain). I know there is d3d_lines to show the wireframe, but I want to set some more options (change the color of the wireframe, as an instance).
Does anybody has an idea/script/(vertex) shader to do this?

[EDIT:] I didn't find a solution, but it isn't important anymore since I found a better-looking way which fits my needs. Thanks, anyway.

Regards
TSGames

in the predefined shaders (mtlFX.c) there is a shader named mtl_wireframe

Edit: sorry, I didn't had read the whole post.