В css находим:
Code
.codeMessage {background:#FFFFFF;font-size:9px;}
.quoteMessage {background:#FFFFFF;font-size:9px;}
и меняем на:
Code
/* CODE and QUOTE */
.bbQuoteName,.bbCodeName {border:1px dashed #000;-webkit-border-radius: 5px;-moz-border-radius: 5px;border-radius: 5px;margin:3px;margin-bottom:auto;}
.quoteMessage,.codeMessage {margin-left:8px;margin-right:8px;-webkit-border-bottom-right-radius: 5px;-webkit-border-bottom-left-radius: 5px;-moz-border-radius-bottomright: 5px;-moz-border-radius-bottomleft: 5px;border-bottom-right-radius: 5px;border-bottom-left-radius: 5px;}
.bbQuoteName {color: #889095; !important; background: #ebeef0 url(http://wulkan.3dn.ru/code_and_quote/code_and_quote_CSS3_quote.png) no-repeat right; font-size: 10pt; !important; font-weight: bold; margin: 0 auto 0 auto; border: 1px #ccd0d5 solid; border-bottom: 1px solid #ccd0d5; padding-top: 7px; padding-bottom: 7px;}
.quoteMessage {color: #465584; background: #f0f3f5; border:1px solid #ccd0d5!important; border-top: 0 !important; text-align:left; padding: 3px;color:#444444;}
.bbCodeName {color: #889095; !important; background: #ebeef0 url(http://wulkan.3dn.ru/code_and_quote/code_and_quote_CSS3_code.png) no-repeat right; font-size: 10pt; !important; font-weight: bold; margin: 0 auto 0 auto; border: 1px #ccd0d5 solid; border-bottom: 1px solid #ccd0d5; padding-top: 7px; padding-bottom: 7px;}
.codeMessage {color: #465584; background: #f0f3f5; border:1px solid #ccd0d5!important; border-top: 0 !important; text-align:left; padding: 3px;font-family:Courier New;font-size: 12px;color:#444444;}
.quoteMessage {color: #465584; background: #f0f3f5; border:1px solid #ccd0d5!important; border-top: 0 !important; text-align:left; padding: 3px;color:#444444;}
/* --------- */
Картинки Сохраняем к себе : 
и 
