2
this is a copy of the template system_block_mainmenu.html:
<table cellspacing="0">
<tr>
<td id="mainmenu">
<a class="menuTop" href="<{$xoops_url}>/"><{$block.lang_home}></a>
<!-- start module menu loop -->
<{foreach item=module from=$block.modules}>
<a class="menuMain" href="<{$xoops_url}>/modules/<{$module.directory}>/"><{$module.name}></a> <{foreach item=sublink from=$module.sublinks}>
<a class="menuSub" href="<{$sublink.url}>"><{$sublink.name}></a>
<{/foreach}>
<{/foreach}>
<!-- end module menu loop -->
<a class="menuMain" href=" <{$xoops_url}>/your path">your text</a> </td> </tr>
</table>
eg:
<a class="menuMain" href=" <{$xoops_url}>/user.php path">Login</a>external: <a class="menuMain" href=" <{$xoops_url}>/your path" target="_blank">your text</a>
this is assuming you have cloned your templates. the bold text is where you add your link and you can add as many as you like.