3ds Max Modeling :: Tiled Terrain From Height Map

My goal is to make a terrain from a height map. The terrain shall be used in a 3d game on the Xbox360. Since I don't want the game to render more polygons than visible by the game camera the terrain needs to be divided into a number of tiles for culling purposes.

So what I've done so far is to create a plane (10x10 with 10x10 subdivisions). I then clone the plane into an 2d array with a total of 100 planes. I then group the planes into a single group. This gives me a terrain object consisting of 100 planes and a size of 100 X 100 units.

Now, here is my question: Is it possible to apply a displacement modifier to this group/planes so that a heightmap will modify the planes and thus create a terrain where each tile is only affected by its "part/area" of the heightmap?

I've tried by adding displacement modifiers to the planes but when applying a heightmap each plane is affected by the whole heightmap and thus the result is that the terrain group consists of a number of identical "mini terrain" planes.