Just wanted to point out a recent post on our blog by one of our integration specialists.
Kathryn has spent the last few weeks working on re-skinning the toolbar and has posted a great tutorial on how to do it. As far as we can tell we couldn't find anything like this online so we thought it would be a good resource to share with the community.
Heres the link: http://www.smallboxsoftware.com/2009/05/21/howto_fcking_skin_the_fckeditor.htm
All the best,
Help with Skinning FCKeditor Toolbar