It's a board wide feature, but maybe you could create a forumlink as a subcategory in your Christianity forum?
To create a link in the navbar, you need to edit your navbar template, in the admincp, goto styles & templates, style manager and then on your style select edit templates, and find the navbar template, then place the example code in the first post.
eg.. find:
Code:
<td class="vbmenu_control"><a href="calendar.php$session[sessionurl_q]">$vbphrase[calendar]</a></td>
add afterwards:
Code:
<td class="vbmenu_control"><a href="vBPrayer.php$session[sessionurl_q]">$vbphrase[vBPrayer_title]</a></td>