Hi.
This is my solution. I guess there are better ones out there, but it worked for me.
First i generated a link to one of the products in my webshop at facebooks "Like" page:
http://developers.facebook.com/docs/reference/plugins/like/Then, in the top part of the flypage, i declared all the variables necessary to build the link:
<?php
if ( isset ( $_GET["page"] ) ) { $fb_page = $_GET["page"]; } else { $fb_page = ""; }
if ( isset ( $_GET["flypage"] ) ) { $fb_flypage = $_GET["flypage"]; } else { $fb_flypage = ""; }
if ( isset ( $_GET["product_id"] ) ) { $fb_product_id = $_GET["product_id"]; } else { $fb_product_id = ""; }
if ( isset ( $_GET["category_id"] ) ) { $fb_category_id = $_GET["category_id"]; } else { $fb_category_id = ""; }
if ( isset ( $_GET["option"] ) ) { $fb_option = $_GET["option"]; } else { $fb_option = ""; }
if ( isset ( $_GET["Itemid"] ) ) { $fb_Itemid = $_GET["Itemid"]; } else { $fb_Itemid = ""; }
?>
I guess there is an easier way.

Then i built the link within the facebook generated code and pasted it inside the layout html:
<iframe src="http://www.facebook.com/plugins/like.php?href=http%3A%2F%2YOURDOMAIN%2Findex.php%3Fpage%3D<?php echo $fb_page; ?>%26flypage%3D<?php echo $fb_flypage; ?>%26product_id%3D<?php echo $fb_product_id; ?>%26category_id%3D<?php echo $fb_category_id; ?>%26option%3D<?php echo $fb_option; ?>%26Itemid%3D<?php echo $fb_itemid; ?>&layout=standard&show_faces=true&width=450&action=like&font=verdana&colorscheme=light&height=80" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:450px; height:80px;" allowTransparency="true"></iframe>
I hope this is of help to someone.
-studiostefan