Can anyone say
How to integrate custom css file to fckeditor or
which are the files need to edit and how
By default fckeditor uses editor/css/fck_editorarea.css
In your init you can set: FCKConfig.EditorAreaCSS = '/youstylesheet.css' ;
you can also use an xml file to define certain properties to your elements, see: http://docs.cksource.com/FCKeditor_2.x/Developers_Guide/Configuration/Styles