[Plugin: Related Posts by Category] display as row or grid?

I don’t exactly know what I’m doing but I got this to work, it shows post thumbnails and titles from the current category in a row instead of a list. I’m using it in loop.single, in the twentyten theme: after

</div><!-- #post-## -->

but before

<?php endwhile; // end of the loop. ?>

[code moderated – please use the pastebin]

this is the css I peiced together:

.header_thumbs {
    float: left;
    margin: 5px;
    overflow: hidden;
    width: 25%;
}

limiting the width forces a row.

The problem is (other than extra mark up no doubt) ..it doesn’t omit the current post.
Anyway, just wondered if anyone knows a way to use css to do the same with the plugin’s output, or perhaps make this code leave out the current post. I tried but I got lost quick, any help would be great.

Here’s a link to a page using the above code, I’m using it as a way to get category specific navigation in the form of a thumbnail gallery below each post, doesn’t look so great as a list, hence my issue with the plugin.
demo

solved, I didn’t have the exclude right:

<?php
$header_thumbs = get_posts('numberposts=4&exclude=' . $GLOBALS['current_id']= $post->ID . '&category='. $category->term_id );
?>

full code and demo:
current-category-thumbnail-row