It should be something like this
[DTVFilterMaterial]
IRImage=TRUE <-----------------------
DepthBufferCheck=FALSE
DepthBufferWrite=FALSE
RenderedInOrder=FALSE
AlphaTestEnabled=FALSE
CullMode=NO_CULL
LightEnabled=TRUE
SpecularEnabled=FALSE
EmissiveEnabled=FALSE
FogEnabled=FALSE
AmbientColor=1.000000,1.000000,1.000000,1.000000
DiffuseColor=1.000000,1.000000,1.000000,1.000000
ZBufferOffset=0.000000
PriorityLevel=2
BlendOp=MODULATE
NumTextureStages=1
TextureStage[01].TextureName=cockpit\GreenTVFilter.bmp
TextureStage[01].MipMap=TRUE
TextureStage[01].FilterEnabled=FALSE
TextureStage[01].StageColorOp=TEXTURE
TextureStage[01].StageAlphaOp=DIFFUSE