Shader Property Array of Textures

Hello,

I'm working on a project that involves using colored labels to denote specific areas on a 3D model. After some searching and experimenting, I think I've found the best way to accomplish the desired effect is to write a custom shader. The built-in decal shader is pretty much exactly what I want; however, I would like to be able to use more than a single texture as a decal. Is it possible to define a texture array within a shader?

Based on my searching, the answer appears to be no:

http://forum.unity3d.com/threads/109667-Dynamic-Shader-Or-Array-of-Shaders-Question

I've working around this by simply defining the number of textures I want as individual 2Ds, but this seems dumb as I would like it to be able to grow the list of textures.

Here is an example:

 Shader "MultiDecal" {
 Properties {
     _Color ("Main Color", Color) = (1,1,1,1)
     _MainTex ("Base (RGB)", 2D) = "white" {}
     _DecalTex ("Decal (RGBA)", 2D) = "black" {}
     _DecalTex2 ("Decal 2 (RGBA)", 2D) = "black" {}
 }
 
 SubShader {
     Tags { "RenderType"="Opaque" }
     LOD 250
     
 CGPROGRAM
 #pragma surface surf Lambert
 
 sampler2D _MainTex;
 sampler2D _DecalTex;
 sampler2D _DecalTex2;
 fixed4 _Color;
 
 struct Input {
     float2 uv_MainTex;
     float2 uv_DecalTex;
     float2 uv_DecalTex2;
 };
 
 void surf (Input IN, inout SurfaceOutput o) {
     fixed4 c = tex2D(_MainTex, IN.uv_MainTex);
     half4 decal = tex2D(_DecalTex, IN.uv_DecalTex);
     half4 decal2 = tex2D(_DecalTex2, IN.uv_DecalTex2);
     c.rgb = lerp (c.rgb, decal.rgb, decal.a);
     c.rgb = lerp (c.rgb, decal2.rgb, decal2.a);
     c *= _Color;
     o.Albedo = c.rgb;
     o.Alpha = c.a;
 }
 ENDCG
 }
 
 Fallback "Diffuse"
 }

Instead of using _DecalTex 1, 2, 3... would it be possible to define an array? I guess the simple solution is to define one that has say 10 textures, then only use the amount I need in each case.