I believe the RTW range values are limited to three digits; thus you cannot have any more than 999. I am not too sure about this though. I have heard of similar test-moddings of the EDU for morale, and inserting "99" did not reflect on the battlefield for some reason. In any case, the range question is very simple to test. Just insert "999" for any unit range in the three EDUs and then test it in a battle.
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