Let's assume I've got a regular Wordpress plugin which I want to put in mu-plugins to be loaded automatically and I want to configure it once for all blogs. I can handle access control and menus, but can't figure out storing settings:
If plugin tries to use it's own table(s) there is no problem - all I have to do is replace $wpdb->prefix/$table_prefix with $wpmuBaseTablePrefix in plugin code to have it use global tables (or change wpdb->prefix /table_prefix value before plugin code and restore it after).
But what if all the settings are in options table? How do I force plugin to use wp_1_options or wp_options (after creating proper table)?