i've been using a popup window to populate my content in the textarea of the Editor.  So you can use the <%=editor.ClientID%>, but it doesn't help you if you're trying to access the CuteEditor from another page (or popup window).  So  you can still use the javascript API, but instead of using :

 

var editor1 = obj_Editor1;

 

use

 

var editor1 = CE_Editor1_ID;

 

Old version (5.2) was:

window.opener.obj_Editor1.editdoc.body.innerHTML = txt; 

 

New version (6.0) is:

window.opener.CE_Editor1_ID.setHTML(txt);

 

 

rock on... love 6.0!!