I'm new to the fck editor so this may be a little off. Go into your fckeditor directory and open fckconfig.js. Search for "FCKConfig.ToolbarSets", you'll see the toolbars you can use and you can play around with that all you want. Off hand I really don't remember where you can change the specific toolbar to use other than in the url '?Toolbar=Default'. Hope this helps and good luck
Re: Specifying buttons