/hload -m has been asked many, many times in this forum in the past:
https://forums.mirc.com/ubbthreads.php/ubb/showflat/Number/232163/
https://forums.mirc.com/ubbthreads.php/ubb/showflat/Number/181278/
https://forums.mirc.com/ubbthreads.php/ubb/showflat/Number/143264/

Still an idea I support, I don't like your /hadd suggestion though.

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