Rounded corners in Cat Strips needed!

[Dan!]

Well, I need to have a rounded edge in cat strips, here is a image of what I want it to look like...

https://vborg.vbsupport.ru/

As you can see from the image, the sides of the bar are seperte images (rounded).

When I click View Source, this is what I get..

<tr>
<td align="left" height="27" valign="top" width="140"><img title=" " src="http://habbos.net/andy/home/misc/cat_left.gif" alt=" " border="0"></td>
<td style="background-image: url(http://habbos.net/andy/home/misc/cat_back.gif);" valign="center" width="100%">


<a style="float: right;" href="#top" onclick="return toggle_collapse('forumbit_3')"><img id="collapseimg_forumbit_3" src="http://habbos.net/andy/home/Buttons/collapse_tcat.gif" alt="" border="0"></a>
<div align="center">
<a href="forumdisplay.php?f=3"><b><font color="#000000">The Forum Lounge</font></b></a></div>




</td>
<td align="right" height="27" valign="top" width="140"><img title=" " src="http://habbos.net/andy/home/misc/cat_right.gif" alt=" " border="0"></td>

</tr>

I want to have this in my forum, but how do I add it?!?

Main CSS? other?
Tell me, and could you tell me how to do it...

Thanks!