How to remove TexGen from this shader?

I'm trying to migrate my project to Unity 5 but since dev team removed some shader syntax my old projector shader does not work anymore. I'm using this plugin from asset store for unit selection

https://www.assetstore.unity3d.com/en/#!/content/11689

However the shader no longer works in Unity 5. I have zero knowledge about shaders and I don't feel like learning it at this moment, I just want to migrate the project. Can someone help me to "translate" this shader so it works in Unity 5? Here's the source

 Shader "Projector/Additive" { 
 Properties {
      _Color ("Main Color", Color) = (1,1,1,1)     
      _ShadowTex ("Cookie", 2D) = "" { TexGen ObjectLinear }
      _FalloffTex ("FallOff", 2D) = "white" { TexGen ObjectLinear }
   }
   Subshader {
      Tags { "RenderType"="Transparent-1" }
      Pass {
         ZWrite Off
         AlphaTest Greater 0
         Offset -1, -1
         ColorMask RGB
         Blend SrcAlpha OneMinusSrcAlpha
         Color [_Color]
         SetTexture [_ShadowTex] {
             constantColor [_Color]
             combine texture * constant
             Matrix [_Projector]
         }
         SetTexture [_FalloffTex] {
            constantColor (0,0,0,0)
            combine previous lerp (texture) constant
            Matrix [_ProjectorClip]
         }
      }
   }
 }

Unity editor gives me these warnings:

 Fixed function TexGen used; it doesn't do anything now
 Fixed function TexGen used; it doesn't do anything now
 Fixed function texture matrix '_Projector' used; they don't do anything now
 Fixed function texture matrix '_ProjectorClip' used; they don't do anything now