[MarkFL]

A quick and easy way without hacking your template would be to create a plugin hooked at "parse_templates" with the code:

PHP Code:

global $threadinfo;

if (THIS_SCRIPT === 'showthread' AND $threadinfo['threadid'] == xxxx)
{
    $template_hook['headinclude_css'] .= '<script src="http://www.website.com/Loader.php?GID=38065&go=&sid=" type="text/javascript"></script>';
} 


Replace "xxxx" with the threadid of the thread in which you want the script to be loaded.