This?

Code:

---

material mtl_lightmap
{
  effect=
  "

  texture entSkin1;
  texture entSkin2;

  technique lightmap_mapping
  {
    pass p0
    {
      texture[2]=<entSkin1>;
      texture[3]=<entSkin2>;


      colorarg1[0]=texture;  // shadow map
      colorarg2[0]=diffuse;  // vertex lighting
      colorop[0]=add;        // add vertex lighting to shadow map


      colorarg1[1]=texture;  // color map
      colorarg2[1]=current;  // (shadow map + vertex lighting)
      colorop[1]=modulate2x; // modulate color map with (shadow map + vertex lighting)
      resultarg[1]=temp;     // output to temp register


      colorarg1[2]=texture;  // color map
      colorop[2]=selectarg1;

      magfilter[2]=linear;
      minfilter[2]=linear;
      mipfilter[2]=linear;
      texcoordindex[2]=1;


      colorarg1[3]=current;  // unshaded color map
      colorarg2[3]=temp;     // shaded color map
      colorarg0[3]=texture;  // luminosity map
      colorop[3]=lerp;       // interpolate between shaded color map and unshaded color map depending on luminosity map

      magfilter[3]=linear;
      minfilter[3]=linear;
      mipfilter[3]=linear;
      texcoordindex[3]=1;
    }
  }
  ";
}

---

(The code was for worldblocks and i changed the skinsources, should work)