Hi sorry I didn't give more info. Here is the instructions:

• Upload seditor.php and se_files folder to your plugin directory.
• Upload sejs folder to wp-includes/js/ directory.
• Comment out “get_sidebar()” in your theme files and write “if(function_exists(”se_get_sidebar”)){se_get_side bar();}else{get_sidebar();}” instead.
• Go to plugin in your admin page and activate “Sidebar editor”.
• Links to plugin page will appear on the submenu of Presentation and Options.

and here is the link for the site: http://flapjack.chips.jp/blog/pp/2005/09/29/44/

Thanks.