Need help with external blocks

[EvilDragon]

I've been using blocks with IPB3 to export the first post of the latest topic with custom CSS to a website.

(http://pyra-handheld.com/blog.html)

This was done using 

  <script type='text/javascript' src='http://boards.openpandora.org/external.php?id=20&amp;k=b0e48a2b6c2bc6695d1fb4e7cc68bf7a&amp;method=div' id='block-b0e48a2b6c2bc6695d1fb4e7cc68bf7a'></script>

Now I'm trying to do the same thing with IPB4 - but I've run into some issues...

1. It totally ignores the setting which forum I want to use to view the post
2. How can I select that it will not show the LAST post in that forums, but only the FIRST post of the LATEST Topic in that forum?
3. How can I exclude that created block in an external website?
 

This is an example how it looked before:
https://web.archive.org/web/20150314230319/http://pyra-handheld.com/blog.html

I want to achieve the same thing again.
Any help?

Thanks in advance