yeah fixing all the templates is quite a pain !
you have to syncronise all those headers.
It's quite well explained on the provided documentation.
things I can already underline is :
don't forget to put the template in the portal directory as well (well not all of it but especially the css) otherwise your portal page won't change it's style.
I see that when loading your page, I get an error on top of the page :
Warning: ob_start(): output handler 'ob_gzhandler' cannot be used after 'URL-Rewriter' in /home/nighth2/public_html/includes/page_header.php on line 42
I had that as well.
simply turn off your gzip compression in the forum configuration and you won't get that error anymore.
good luck on the template stuff!!