Inho
Выбираете прозрачный стиль 'Mybb_The_Series_Black' и ставите в ХТМЛ-верх код:
<style/type="text/css"> #pun th {color: #8ba095; border-color: #8ba095;} #pun-title table {background-color: black !important;} #pun-ulinks .container, #pun-announcement .container, #pun-status .container, #pun-crumbs1 .container, #pun-stats .container, #pun-crumbs2 p.container, #pun-about p.container, #html-footer .container {background-color: black !important;} #pun-main .post h3, #pun-main .post h3 span, #pun-main .post .permalink, #pun-main .post h3 strong, #pun-main .post-author ul, #pun-main .post .container, #pun-main .post-body, #pun-main .post-content, #pun-main .post-links ul, #pun-main .formal .container, #pun-main fieldset, #pun-main .fs-box, #pun-main .formal textarea {background-image: url("http://s61.radikal.ru/i174/0905/92/1dfa2bb4cbfc.jpg") !important;} #pun-main .quote-box, #pun-main .code-box {background-color: #04080b !important;} </style>