If you've already got the monitor set up to run sideways (meaning if you drag a window over there, text and such appears right side up), then keyclone should recognize resolution of the monitor as 1050x1680 in it's maximizer setup and you can set up the four windows as you normally would. However, I'm not sure you can get Windows to recognize the sideways monitor in horizontal span mode; I think that requires dual view. If you can't do that, there's nothing that keyclone can do for you.

That said, I don't know why you'd want tall, skinny windows for your clones, but I'm sure you have your reasons. :P