hehe.. no probs..

edit the file: /templates/footer.tpl (you can do that directly in control panel, if you want)

find:

Code
<a href="{ubb url="ubb=boardrules&v=1"}">{$lang.BOARD_RULES}</a> &middot;

replace : {ubb url="ubb=boardrules&v=1}

with the URL to your new/improved rules.html or whatever wink

example:

Code
<a href="http://mydomain.com/ubbthreads/boardrules.html">{$lang.BOARD_RULES}</a> &middot;