[nerbert]

You can do it with a plugin at "editor_toolbar_set"

Look at vb/ckeditor.php, line 338. It's built up the array $toolbar then changed it to $this->config['toolbar']. So you want to re-write $this->config['toolbar'][13] or $this->config['toolbar'][14] if $iespell, so it would be something like this

 
if($this->editor_type == 'fe' OR $this->editor_type == 'cms_article')
{
     if($iespell)
     {
          $this->config['toolbar'][14] = array( ........);
     }
     else
     {
          $this->config['toolbar'][13] = array( .......);
     }
}