ah, maybe i didn’t explain this properly. I know what to do with the functions.php, etc, it’s just that my wp_list_comments above already had some code in there to remove a reply button on thread posts.
My problem is how to keep that AND add the “type=comment&callback=mytheme_comment” commands.
An example, albeit incorrect, but it shows what i’m after):
<?php wp_list_comments('type=comment&callback=mytheme_comment', array('type=comment','reply_text'=>'<span class="reply-box">Reply</span>')) ; ?>