<style>
td.tcr a {
background: transparent url(Адрес картинки) no-repeat 0px 0px;
}
</style>

<style>
td.tcr a{
background-image: none;
}
</style>

<td background="http://i046.radikal.ru/0912/a9/cedc308843c1.gif">СОДЕРЖИМОЕ ЯЧЕЙКИ</td>

<style>
.post-box {font-size:16px;}
</style>

<style type="text/css">
#pun {background-color: transparent; width: 76%;}
</style>

#pun {
background: url(http://forumupload.ru/uploads/000a/45/08/70-1.png);
}

/* CS1.1 */
.punbb .section .container, .punbb .post-body, .punbb .post-links, .punbb td.tc2, .punbb td.tc3,
.punbb .formal fieldset .post-box, #viewprofile li strong, #viewprofile li div, #setmods dd,
.punbb .info-box, .punbb #pun-main .info-box .legend {
  background: transparent;
  color: #333;
  }

/* CS1.2 */
.punbb .main .container, .punbb .post .container, .punbb .post h3, .punbb-admin #pun-admain .adcontainer {
  background: transparent;
  color: #333;
  }

/* CS1.3 */
#pun-stats h2, .punbb .main h1, .punbb .main h2, #pun-debug h2, .punbb-admin #pun-admain h2 {
  background: transparent;
  color: #eee;
  }

/* CS1.4 */
#pun-title .container, .punbb .modmenu .container {
  background: transparent;
   color: #333;
}

/* CS1.5 */
.punbb legend span, #viewprofile h2 span, #profilenav h2 span, .punbb-admin #pun-admain legend span {
  background: transparent;
  color: #005EAB
  }

/* CS1.6 */
.punbb .post h3 span, .punbb th, #viewprofile li, #setmods dl  {
  background: transparent;
  color: #333
  }

/* CS1.7 */
.punbb .quote-box, .punbb .code-box {
  background-color: #f9f9f9;
  color: #333
  }

/* CS1.8 */
#pun-navlinks .container {
background: transparent;
  color: #f1f1f1;
  }