wordpress php and the loop (?)

hi! i’ve bought and am now trying to customize a theme (really bad support — will not mention theme name, don’t wanna dis the guy publicly).

Anyways worked through all of my issues except one.

i’ve got this piece of code:

<?php		if ($tagged == '') :
				query_posts('cat='.$category[0]->cat_ID.'&showposts=1000');
				$postnumber =0;	$tpn=0;
				if ( have_posts() ) : while ( have_posts() ) : the_post();
					$postnumber++;
					if ($post->ID == $theid):
						$tpn = $postnumber;
					endif;
					if (($tpn!=0)&&($tpn+4>=$postnumber)): ?>
						<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
<?php				elseif (($tpn!=0)&&($tpn+4<$postnumber)):
						brake;
					endif;
				endwhile; endif;
				$offset=$tpn-$tpn%quonfig(5);
			else :
				$offset=0;
			endif;?>

and im trying to put this in to exclude posts from cat4 showing up:
<?php if (in_category('4')) continue; ?>

any help would be greatly appreciated!

Thanks in advance for helping out a total newbie! (hey i’m practically begging here!)