Sorry forgot about this thread

You will need to edit the navbar template and add a conditional around the tabs you want to hide.
<vb:if condition="$show['member']"> is the tag you put in front of the stuff you want to hide from guests.
</vb:if> is the tag you put at the end of the stuff you want to hide from guests.
This example is the default code for the "what's new" tab, it hides the tab from guests. As I don't have that tab mod installed I can't show you an example using the code from one of the tabs you created.
Code:
<vb:if condition="$show['member']">
<li><a href="search.php?{vb:raw session.sessionurl}do=getnew&contenttype=vBForum_Post">{vb:rawphrase new_posts_nav}</a></li>
<vb:else />
<li><a href="search.php?{vb:raw session.sessionurl}do=getdaily&contenttype=vBForum_Post">{vb:rawphrase todays_posts}</a></li>
</vb:if>