This script adds a class icon next to the class name in the roster. Add this code to your header area, footer or into a free form text/HTML box on your roster page. Make sure you switch to HTML mode () before pasting or right click in the editor and choose "Paste As Html".

<script type="text/javascript">
$(document).ready(function() {
 var tmp, cIcon = [];
 var iconHeight = 25;
 var iconWidth = 25;
 cIcon.push (["Burglar","http://i201.photobucket.com/albums/aa236/Mottie1/testsite/icons/burglar_icon64.png"]);
 cIcon.push (["Captain","http://i201.photobucket.com/albums/aa236/Mottie1/testsite/icons/captain_icon64.png"]);
 cIcon.push (["Champion","http://i201.photobucket.com/albums/aa236/Mottie1/testsite/icons/champion_icon64.png"]);
 cIcon.push (["Guardian","http://i201.photobucket.com/albums/aa236/Mottie1/testsite/icons/guardian_icon64.png"]);
 cIcon.push (["Hunter","http://i201.photobucket.com/albums/aa236/Mottie1/testsite/icons/hunter_icon64.png"]);
 cIcon.push (["Lore-master","http://i201.photobucket.com/albums/aa236/Mottie1/testsite/icons/lore_master_icon64.png"]);
 cIcon.push (["Minstrel","http://i201.photobucket.com/albums/aa236/Mottie1/testsite/icons/minstrel_icon64.png"]);
 cIcon.push (["Rune-keeper","http://i201.photobucket.com/albums/aa236/Mottie1/testsite/icons/runekeeper_icon64.png"]);
 cIcon.push (["Warden","http://i201.photobucket.com/albums/aa236/Mottie1/testsite/icons/warden_icon64.png"]);

 var iconImg = "<img style='vertical-align:middle' height='" + iconHeight + "' width='" + iconWidth + "' src='";
 var c2 = $.map(cIcon, function(n){ return n[0] }); // grab first entry of each cIcon so $.inArray can be used
 $(".gpWidget-rosterlrg").find("tr.NormGridRow,tr.AltGridRow").find("td:gt(1)").each(function(){
  tmp = $(this).text().replace(/^(\s|\u00A0)+|(\s|\u00A0)+$/g,'');
  if (tmp.length) {
   tmp = $.inArray( tmp, c2 );
   if ( tmp >= 0 ) {
    $(this).html(function(i,h){ return iconImg + cIcon[tmp][1] + "'> " + h; });
   }
  }
 })
});
</script>