Shaders for Unity3D - repost 2

I need two shaders for Unity3D. 1. I have vehicle model and 3 textures diffuse, bump-mapping and specular. I need shader for unity3D to add metal shine to vehicle. You can use 2 or 3 textures in shader ( up to you, as necessary) 2. I neeed double sided diffuse shader for tank track All must be done in Unity 3.5.7 I provide test scene with vehicle model, materials and textures in Unity package I provide shaders from another coder, that work incorrectly You must fix existing shaders or provide you own ones You must returm me the same scene with modified materials in Unity package with shader sources inside