ck editor and ck finder

download ckeditor for drupal
http://drupal.org/project/ckeditor
download another ckeditor from
http://ckeditor.com/download *
download ckfinder
http://ckfinder.com/download *

install ckeditor
copy and paste inside the ckeditor folder
ckeditor/ckeditor*
ckeditor/ckfinder*

In that ckfinder file config.php remove the check authentication function and paste
require_once '../../../../includes/filemanager.config.php';
under base url
require_once path from ckeditor folder readme.txt and enable default/settings.php enable cookie_domain="example.com"