Corel PHOTO-PAINT X5 :: Creating Bump Maps For MS Flight Simulator X

Ideally I would like to use the nVidia normal map filter plugin - it's for Photoshop, and although, apparently, you can use some photoshop plugins, this one does not seem to work.

First question - is there a way to use the nVidia plugin?

Next - is there a Corel way?

I have created my own greyscale heightmap images and I can export red channel for alpha. Then I flood fill the red channel black and the blue channel white and export the RGB as the colour part. Creating a dds image gives me a pseudo bumpmap

BUT

Whenever I use this kind of bumpmap I get the effect I want on the aircraft models, but for some reason, "my" bumpmaps seem to remove the polygon smoothing of the 3D models so that when I "fly" the aircraft, I actually see the polygons instead of the smotthed mdl surface.This photbucket link shows what I mean.

The left hand image shows the original bumpmap on the original model. The next image shows modified artwork on the same model. Then I have change to a "D-i-Y" bumpmap and the last two show that although the desired bumps are there, I now have the wireframe polygons visible.