General Support: Custom search function

Hi, I'm trying to manually run plogger's search function because I want the result at a specific page.

Easier to see than to explain, so here is the url for the searchpage: http://www.truemetal.org/cirithungol/search.php
A valid searchterm is "paradise lost", another is "baker".

I've tried to put these lines under the "Results in Photo Gallery"-header, but no luck.
$_GET["searchterms"]="baker";
$_POST["searchterms"]="baker";
$searchterms="baker";

$level="search";
$_GET["level"]="search";
$_POST["level"]="search";

the_plogger_gallery();