3D Images on Terrain?

[LunaRebirth]

Okay so what I'm trying to do is basically the same as multi-texturing a heightmap terrain.

BUT I want to be able to control the X and Y coordinants where the image is displayed onto the terrain.

It needs to actually map to the terrain, so like; I've got a pure white image on a pure green terrain. the image is smaller than the terrain, and I want to be able to move it around as it aligns with hills and other ground objects.

I know this is possible, so how do I do it???

[CuteAlien]

That looks nearly the same as your other question about roads....
You can move a texture around with the texture matrix. But if your problem is that you want many such smaller images then it is no longer such a trivial problem.

[LunaRebirth]

But how do I do it? I'm fairly new to Irrlicht