No need in disabling HTML.
In functions.php find
PHP Code:
if(!$dohtml) { // kill any rogue html code
// $bbcode=str_replace("&","&",$bbcode);
$bbcode=str_replace("<","&lt;",$bbcode);
$bbcode=str_replace(">","&gt;",$bbcode);
$bbcode=str_replace("<","<",$bbcode);
$bbcode=str_replace(">",">",$bbcode);
}
And below add
PHP Code:
$bbcode=str_replace("<FLASHCODE>","<FLASHCODE>",$bbcode);
But replace FLASHCODE with the code that calls in the movie.