Spróbuj tak:
1. Wchodzisz w ACP -> Style i Szablony -> Szablony -> Twój_Szablon -> Opis posta -> postbit_classic
2. Zamień w nim kod na ten (*Oczywiście zrób kopię Twojego kodu!):
{$ignore_bit}
<table border="0" cellspacing="{$theme['borderwidth']}" cellpadding="{$theme['tablespace']}" class="tborder" style="{$post_extra_style} {$post_visibility}" id="post_{$post['pid']}">
<tr>
<td class="trow_post1" width="15%" valign="top" style="white-space: nowrap; text-align: center;border-right: 1px solid #FFFFFF;""><a name="pid{$post['pid']}" id="pid{$post['pid']}" ></a>
<strong><span class="largetext">{$post['profilelink']}</span></strong><br />
{$post['groupimage']}
{$post['onlinestatus']}<br />
<span class="showthread_useravatar">{$post['useravatar']}</span></br>
<span class="smalltext" style="float: center;">{$lang->postbit_posts} {$post['postnum']}</span>
{$post['user_details']}
{$post['iplogged']}
</td>
<td class="trow_post2" valign="top">
<table width="100%">
<tr><td>{$post['posturl']}<span class="smalltext"><strong>{$post['icon']} <font color="#99c588">{$post['postdate']} {$post['posttime']}</font> <font color="#FFFFFF">{$post['subject']} {$post['subject_extra']}</font></strong></span>
<br />
<div id="pid_{$post['pid']}" class="post_body">
<font color="#FFFFFF">{$post['message']}</font>
</div>
{$post['attachments']}
{$post['signature']}
<div style="text-align: right; vertical-align: bottom;" id="post_meta_{$post['pid']}">
<div id="edited_by_{$post['pid']}">{$post['editedmsg']}</div>
</div>
</td></tr>
</table>
</td>
</tr>
<tr>
<td class="trow_post1" style="white-space: nowrap; text-align: center; vertical-align: middle;border-right: 1px solid #FFFFFF;"></td>
<td class="trow_post2" style="vertical-align: middle;">
<table width="100%" border="0" cellpadding="0" cellspacing="0">
<tr valign="bottom">
<td align="left" >
{$post['button_email']}{$post['button_pm']}{$post['button_find']}{$post['button_rep']}</td>
<td align="right">{$post['button_edit']}{$post['button_quickdelete']}{$post['button_quote']}{$post['button_multiquote']}{$post['button_report']}{$post['button_warn']}{$post['button_reply_pm']}{$post['button_replyall_pm']}{$post['button_forward_pm']}{$post['button_delete_pm']}</td>
</tr>
</table>
</td>
</tr>
</table>
<br />
3. Wejdź w ACP -> Style i Szablony -> Twój_Styl -> global.css -> tryb zaawansowany.
4. Na końcu dodaj:
.trow_post1 {
background: #f5f5f5;
color: #FFFFFF;
}
.trow_post2 {
background: #f5f5f5 url(link/do/obrazka.png) no-repeat;
color: #FFFFFF;
}
*Nie obiecuję że zadziała ale warto spróbować.