Question about self-made navigation

[Speedy2000]

I'm using a skin that doesn't contain the page navigation (the navigation that is built like Website name > Current Forum > Current Sub-forum). So I'm creating one by myself.

This is what I have so far:

<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" >
<tr>
 <td class="alt1">
  <b><a href="$vboptions[forumhome].php">$vboptions[bbtitle]</a></b>
   <if condition="$show['forumdesc']">
   &nbsp; &gt &nbsp;<a href="$vboptions[forumurl]">$foruminfo[title]</a></if>
 </td>
</tr>
</table>

This code works just fine. But when I browse to a sub-forum, then it doesn't show the parent forum because the code isn't finished yet. In that case, the navigation looks like Boards name > Sub-forum name. You can see it on my website (top left corner) (http://forums.techlifezone.com)

Now I need to know how I can modify the code in such a way, that both the parent forum and the subforum are visible in the navigation?

Current wrong situation:
Boards name > current sub-forum name

Correct situation:
Boards name > parent forum name > Current sub-forum name