Every FCEditor instance has two radio buttons above:

O  Basic Text Editor     O  Rich Text Editor

where the Basic Text Editor option will show a plain textfield with another three radio buttons below (Raw, HTML, Text) and the Rich Text Editor option will show the editor with all the toolbars and buttons. How can I disable all the "Basic Text Editor (Raw, HTML, Text)" stuff? I did not find it in the FCKconfig.js so far,

 this is not a feature of the FCKEditor, but of the texteditor control used to display it. The module can specify, whether to show these options when using the editor control.

 you need to find the code in edit "page" control, where texteditor control is integrated.