This is a patch on ckeditor 3.6.2.
(this is a new feature and not actually a bugfix, I call it a patch because it involves editing an existing pluging file)

This patch allows inserting html source into the wysiwyg iframe area, which you can NOT edit in the editor itself, is NOT saved in the real source, but WILL allow you to modify the appearance of the wysiwyg editor.
It does this by inserting (both prepending and appending) html in the body tag of the wysiwyg editor.
(Note: it only works for the NON-FULLPAGE version. luckily, you won't need it for the fullpage config.)

for example, you can add <div id="x" class="y">...</div> wrappers so included css files will work.

USAGE EXAMPLE:

site.css:
body#mybodyid.mybodyclass div#myIdcontainer  div.myclasscontainer1{float:right;}
body#mybodyid.mybodyclass div#myIdcontainer  div.myclasscontainer1 div.myclasscontainer2{color:#f00;font-weight:bold;}

html/js:
<script>
	var myckconfig = {
		contentsCss : 'site.css?1234',	
		bodyId      : 'mybodyid',
		bodyClass   : 'mybodyclass',
		bodyPrepend : '<div id="myIdcontainer"><div class="myclasscontainer1"><div class="myclasscontainer2">',
		bodyAppend  : '</div><br style="clear:both;" /></div></div>',
	};
	$('textarea.ckeditor1').ckeditor(myckconfig);
</script>
<textarea class="ckeditor1">this should show up bold and red!</textarea>
