Php Admin Area - online/offline status

I will need the following: Php Admin (one main admin and subadmin users with less or different capabilities in admin area) Main admin user will be able to add/delete subadmin users and also update info on each subuser - add a thumbnail for that subuser Subuser will be able to only change status to ONLINE OR OFFLINE All online subusers thumbnail will be showing on one webpage ("girls online") All online and offline subusers will be showing on another webpage ("all girls") Main admin user will have capabilities to link thumbnail to desired url... EX: [login to view URL] - this will be one girls personal page which will be manually created and updated outside of admin/php function