[wittmania]

I assume you mean on a topics/posts page. Find post.php, and insert this code wherever you want the name/profile link:

<a href="<?php _e(attribute_escape

(get_user_profile_link

(get_post_author_id()))); ?>">

<?php _e(get_post_author()); ?></a>

I broke it up into several lines for easier reading here, but it should all be on one line. This will build the profile link using the post author’s name as the text for the link.