Display only the first 4 images in an image gallery.

Ok so I m creating a portfolio site and on the category section I want to only display the Post thumb and the image gallery that is attached.

I am basing the design after this code:
http://nicholasiversonphotography.com/

On the post I only want to display the first 4 images of the Gallery. When someone clicks into the the post they will be able to see the full gallery but I only want the first 4 to display on the category.php.

This is teh page I am working on.
http://spacedogcreative.com/category/portfolio/campaigns/

Here is the code i am using. I have a conditional tag included.

<?php $images =& get_children( 'post_parent='.$id.'&post_type=attachment&post_mime_type=image' );
                                if( count($images) > 1 ) echo do_shortcode('[gallery option1="value1" columns="4" link="file"]'); ?>

HELP please!