Location of toolbar set definitions for FCKEditor plugin?

Hi

Getting to grips with my first site with MODX and have been trying to set up a custom FCKEditor toolbar without success.

So what I have is MODx 0.9.6 installed with all default plugins installed. I’ve also installed v2.4.3 of the plugin from the repository.

In the manager I’ve then gone to Tools>Configuration, selected FCKEditor as the rich text editor choice. I see then there’s an FCKEditor settings section and a drop down offering options for the toolbar of: Basic | Standard | Advanced | custom.

If I select custom I get the Toolbar set "custom" doesn’t exist error when trying to edit the home page.

My question is where are the button sets for the other 3 options defined? I ask as the fckconfig.js file only has definitions for Basic and Default and altering those seems to have no effect.

I’m sure I’m missing something simple so any pointers would be great.

Cheers

Mark