from fckeditor to ckeditor

Hi, I'm using fckeditor on the CMS. I want to upgrade to ckeditor. My settings for fckeditor:

<script type="text/javascript" src="./inc/fckeditor/fckeditor.js"> </ script>
   <! -
   var sToolbar;
   var oFCKeditor = new FCKeditor ('content');
   oFCKeditor.BasePath = "./inc/fckeditor/";
   oFCKeditor.Config ["ProcessHTMLEntities"] = false;
   oFCKeditor.Config ["CustomConfigurationsPath"] = "./ fckconfig.js ";
   oFCKeditor.Height = "300";
   oFCKeditor.ToolbarSet = "MySite";
   oFCKeditor.Value ='{$content}';
   oFCKeditor.Config ["UploadCustom"] = false;
   oFCKeditor.Create ();
   //-->
   </ script>

And that's what I tried to ckeditor:

<script type="text/javascript" src="./inc/ckeditor/ckeditor.js"> </ script>
  <script type="text/javascript">
var oCKeditor = new CKeditor ('content');
oCKeditor.BasePath = "./inc/fckeditor/";
CKEDITOR.replace( 'content' );
  </script>

But this does not work. Help me update ckeditor.
Sorry for my english.