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You could map a couple of those polygons to the correct UV position, delete the rest (literally delete the polygons from the model) and clone the ones that are positioned right. Since the distance is the same between each window, it shouldn't be much of a job.

I'm not familiar with UV mapping in Max, but you could give it a try, or look it up. In another 3D app I have, I can cut the polygons from the UV map, select one that has the exact same number of vertices, and paste. That will make sure all similar polygons overlap and occupy the same UV space, which is just what you want in your case.
 
You could map a couple of those polygons to the correct UV position, delete the rest (literally delete the polygons from the model) and clone the ones that are positioned right. Since the distance is the same between each window, it shouldn't be much of a job.

I'm not familiar with UV mapping in Max, but you could give it a try, or look it up. In another 3D app I have, I can cut the polygons from the UV map, select one that has the exact same number of vertices, and paste. That will make sure all similar polygons overlap and occupy the same UV space, which is just what you want in your case.

Oh man! I did not think of that. I will try that right away