This is a demo for WordPress plugin developers. It shows how to create your own form for Screen Options panel. Method was successfully implemented in Q2W3 Inc Manager Plugin and tested for compatibility with WP 2.8.x and WP 2.9.1.
WARNING! Do not use this method if WP 2.8 metaboxes are used on your plugin settings page (functions add_meta_box and on_screen_layout_columns)!