Update On the Net enables you to create as many main and subcategories as you wish. You can move images between categories and can also be given the ability to delete.
Yes. Advanced users, Managers, Administrators (this can be labled whatever you need) can be granted special access levels on the system allowing them to upload/download, delete, move and create new pages throughout your site. Of course there is the first level as well, unregistered users.
Business IT