It is a block mikem has created, i have created almost an exact type of block becuase like you think, it look much better than the menu that comes with nuke.
just create a block using an html editor, write the code for it to look similar like this
I took this from my site, you would edit it for your own
<body>
<table width="140" border="0" cellspacing="2" cellpadding="0">
<tr>
<td width="12">[img]images/mini.gif[/img]</td>
<td width="122">
Home</td>
Then do the exact same thing with Forums, downloads, and what not...
Here is my whole code but this works for my site.
<body>
<table width="140" border="0" cellspacing="2" cellpadding="0">
<tr>
<td width="12">[img]images/mini.gif[/img]</td>
<td width="122">
Home</td>
</tr>
<tr>
<td width="12">[img]images/mini.gif[/img]</td>
<td width="122">
Account</td>
</tr>
</table>
<hr>
<table width="140" border="0" cellspacing="2" cellpadding="0">
<tr>
<td width="12">[img]images/mini.gif[/img]</td>
<td width="122">
Store</td>
<tr>
<td width="12">[img]images/mini.gif[/img]</td>
<td width="122"><a href="modules.php?name=Content&pa=showpage&pid=2"> Meet
The Band</a></td>
<tr>
<td>[img]images/mini.gif[/img]</td>
<td>
Gallery</td>
</tr>
<tr>
<td width="12">[img]images/mini.gif[/img]</td>
<td width="122">
Forums</p></td>
</tr>
<tr>
<td width="12">[img]images/mini.gif[/img]</td>
<td width="122">
WebCam</td>
</tr>
<td width="12">[img]images/mini.gif[/img]</td>
<td width="122">
SWL Chat</td>
<tr>
<td>[img]images/mini.gif[/img]</td>
<td>
Members List</td>
</tr>
<tr>
<td width="12">[img]images/mini.gif[/img]</td>
<td width="122">
Private Messages</td>
</tr>
</table>
<hr>
<table width="140" border="0" cellspacing="2" cellpadding="0">
<tr>
<td width="12">[img]images/mini.gif[/img]</td>
<td width="122">
Recommend Us</td>
</tr>
<tr>
<td width="12">[img]images/mini.gif[/img]</td>
<td width="122">
Submit News</td>
</tr>
<tr>
<td width="12">[img]images/mini.gif[/img]</td>
<td width="122">
Statistics</td>
</tr>
</tr>
</table>