you really need to be able to reinstall unfortunately - you've probably got more than just those bits of mod floating around in there
to try and sort out the world map you could try deleting (or better just renaming) the map.rwm file which will be either in your campaign or base folder
look in rtw/bi/data/world/maps/campaign....
that regenerates when you launch a campaign and stores a lot of information about the map as it was last played - but as you have a mangled install it might not regenerate for you - be warned!!!!
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