add Custom Field to Inline Post plugin

I’m using Aral Balkan’s Inline Post plugin to embed multiple posts in pages. This is fine and dandy, but I’m now trying to figure out how to add a custom field to the Inline Post’s custom loop?

Here is all 94 lines of code from Balkan’s Inline Post (sorry!):
<?php
}

//
// Actual functionality
//

function includePosts ($content = ”)
{
// Get the Post IDs to include. Post IDs are in the form [nnn].
preg_match_all(‘/(?<=\\[\\[)\\d+?(?=\\]\\])/’, $content, $matches, PREG_PATTERN_ORDER);

// Create a table of contents for the top of the page.
$tableOfContents = ‘<ul class=”toc”>’;

$numMatches = count($matches[0]);

for ($i = 0; $i < $numMatches; $i++)
{
$titleTag = get_option(‘inlineposts_title_tag’);

$postId = $matches[0][$i];
$post = get_post($postId);

$anchorTag = ‘‘;

$linkToPost = ‘‘;

$topLink = ‘Top‘;

$postTitle = $post->post_title;

// Update the table of contents
$tableOfContents .= ‘

• ‘.$postTitle.’

‘;

$postTitleText = “<$titleTag>$linkToPost$postTitle$anchorTag</$titleTag>”;
$postBodyText = format_to_post($post->post_content);

// Display the edit link next to topic headers if user has edit permissions.
$canEdit = false;
$editLink = ”;
if (current_user_can(‘edit_page’, $postId))
{
$file = ‘page’;
$canEdit = true;
}
if (current_user_can(‘edit_post’, $postId))
{
$file = ‘post’;
}

if (!is_attachment() && $canEdit)
{
$location = get_option(‘siteurl’) . “/wp-admin/{$file}.php?action=edit&post=$postId”;
$editLink = “Edit individual post.“;
}

//Text to display = Post Title, Last Modified, Comments
//$text = $postTitleText.'<small>’.$lastModifiedText.’ ‘.$commentsText.’. ‘.$topLink.’. ‘.$editLink.”</small>”.$postBodyText;
//modified DAC – 12/18/08
$text = $postTitleText.$postBodyText;

// Remove comments and any line breaks before the tags
// so that these don’t cause WordPress to insert extra
//
tags.
$content = preg_replace(‘/<!–.*?–>/’, ”, $content);
$content = str_replace(“\r\n[[“, ‘[[‘, $content);

// Replace the post placeholder with the actual post.
$content = str_replace(“[[$postId]]”, $text, $content);
}

$tableOfContents .= ”;
$attribution = get_post_meta($postId, ‘Attribution’, $single = true);
// Add top anchor
$content = ”.$content;

// Add the TOC if user requested it
$content = str_replace(“TOC“, $tableOfContents, $content);

error_log($tableOfContents);

return $content;
}

//
// Hooks
//

add_action(‘admin_menu’, ‘addAdminPage’);
add_filter(‘the_content’, ‘includePosts’, 1);

?>