What did you have in mind for editing this list, if you do not want to edit a post/page?
The List Manager plugin is fantastic since all lists can be re-usable on many different places on your site. Unfortunately the admin area only works in older versions of WP (1.5). After upgrading to a newer version of WP, the lists do still display when embedded on a site. I may look into the code to see if I can figure out how to modify the code to get the admin area working again.
Or maybe a more skilled plugin coder is willing to adopt this plugin?
I looked at the code and this is very easy to fix. Download the plugin and open edit-lists.php in a text editor. Search for all instances of edit-lists.php? and replace with edit.php?page=edit-lists.php&. At the very bottom delete this line: include(‘admin-footer.php’);.
Upload the modified edit-lists.php file to the plugin folder (not to the admin folder as per the instructions). Activate the plugin, then go to Manage -> Lists and start creating lists. View the instructions for the various codes for embedding the lists on your site.
