control what each comment looks like when wp_list_comments() runs. place in functions.php

Comment Callback Function

/**
 * Comments.php callback function	
 */
//this will control what each comment looks like when wp_list_comments() runs. 
function awesome_comment($comment, $args, $depth) {
		$GLOBALS['comment'] = $comment;
		extract($args, EXTR_SKIP);

		if ( 'div' == $args['style'] ) {
			$tag = 'div';
			$add_below = 'comment';
		} else {
			$tag = 'li';
			$add_below = 'div-comment';
		}
?>
		<<?php echo $tag ?> <?php comment_class(empty( $args['has_children'] ) ? '' : 'parent') ?> id="comment-<?php comment_ID() ?>">
		<?php if ( 'div' != $args['style'] ) : ?>
		<div id="div-comment-<?php comment_ID() ?>" class="comment-body">
		<?php endif; ?>
		
		<?php //customize HTML output below this line  ?>
		
		<div class="comment-author vcard">
			<?php echo get_avatar( $comment->comment_author_email, 70 ); ?>
			<span class="fn"><?php comment_author_link(); ?></span>
		</div>
		
<?php 
//special message if the comment is awaiting admin approval
if ($comment->comment_approved == '0') : ?>
		<em class="comment-awaiting-moderation"><?php _e('Your comment is awaiting moderation.') ?></em>		
<?php endif; ?>

		<?php comment_text() ?>

		<div class="comment-meta commentmetadata">
			<span class="comment-date"><?php comment_date('F j, Y'); ?></span>
			<span class="comment-link"><a href="<?php comment_link(); ?>">link</a></span>
			
			<?php
			if( comments_open() ): ?>
			<span class="comment-reply-button">
			<?php comment_reply_link( array_merge( $args, array(
				'depth' => $depth,
				'max_depth' => $args['max_depth']
			) ) ); ?></span>
			<?php endif; ?>
		</div>

		
		<?php if ( 'div' != $args['style'] ) : ?>
		</div>
		<?php endif; ?>
<?php
}