Yes of course! Here we go

But remember, if you're gonna use it, you may have to re-organize your other shaders. out Color1 must be black.

Html:
//for example your tree or terrain or building shader
void PS_PASS1( in float2 Tex0:TEXCOORD0, out float4 ocolor0 :COLOR0,out float4 ocolor1 :COLOR1 )
{
	
	float4 color = tex2D(ColorMapSampler, Tex0);
	ocolor0= color;
	ocolor1=float4(0,0,0,1);
}