I am afraid I am not au fait with running mods through .exes they were not intended for. I know that in an Alexander modfolder I needed to keep the battlefields folder with a descr_strat file present in order for CBs to work (though this will not be your answer in whole if at all). Not quite sure why that works tbh. I think Alex may work a little differently from RTW and BI in regard to the CBs and HBs, probably in the folder structure and possibly text files. The map files themselves do not seem to be suspect as the campaign map will work.
Best of luck in finding the answer - and do post here, whoever finds it.
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