Installin on Mediawiki

Could anyone help me with installing the editor on wiki.

My mediawiki is on Xamp, i unzipped ckeditor to the site folder/extentions and made changes in LocalSettings.php :?:

require_once("$IP/extensions/CKeditor/CKeditor.php");

But still cant use the editor on the site. :roll: Should i make more changes? If yes what kind.

I searched the web a lots and just found very liitle about it. :cry:

Please help

Thanx