Sorry, I do not understand. Can You please show me an example of Your problem on live site ?
<gavern:social><fb:like href="<?php echo $cur_url; ?>" GK_FB_LIKE_SETTINGS></fb:like></gavern:social>
I think it would be the fastest option.
This folder is located under template directory You are using.
Here is a generator for buttons code: http://developers.facebook.com/docs/ref ... gins/like/
What I adviced was to add this code directly to article layout, so it would be added once and displayed on all articles. Also I can see this file in Your installation /html/com_content/article/default.php, I've meant a template files, so a full path would be: /templates/[template_name]/html/com_content/article/default.php