[Plugin: Role Scoper] Remove meta box post/page edit panel

Hi All,

I would like to remove some meta boxes in the edit page panel, the below code in functions.php works with other meta boxes but not for the Role scoper meta boxes.

function remove_post_custom_fields() {
	remove_meta_box( 'rs_private_page_reader' , 'page' , 'normal' );
}
add_action( 'admin_menu' , 'remove_post_custom_fields' );

I assume RS is overwriting this because of the option “Limited Editing Elements”, can I disable this overwrite?

More information on the problem:
We have a system with around 700 users, this is causing the administrators to have a slow interface when they are editing pages.
Because RS loads all the users in the meta boxes on the edit page, besides the server side this requires alot of javascript calculation. This is why I want to disable the meta boxes or disable the loading of all those users.

Any body an idea where to search?

Many thanks,
Janick

http://wordpress.org/extend/plugins/role-scoper/