Well I would say replace.. but if it messes up you can always use the original template for it....
----------
<tr id="cat">
<td bgcolor="#336D95" background="https://vborg.vbsupport.ru/images/catagory_backing.gif" colspan="6"><a href="forumdisplay.php?s=$session[sessionhash]&forumid=$forum[forumid]"><normalfont color="#000000"><b>$forum[title]</b></normalfont></a>
<br><smallfont color="#000000">$forum[description]</smallfont></td>
</tr>
----------
===
----------
<tr id="cat">
<td bgcolor="#336D95" background="https://vborg.vbsupport.ru/images/catagory_backing.gif" colspan="6"><a href="forumdisplay.php?s=$session[sessionhash]&forumid=$forum[forumid]"><img src="https://vborg.vbsupport.ru/images/categories/$forum[forumid].gif">
</a>
</td>
</tr>
----------
something like that
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