Here are the answers to all your questions about Aidango.
Yes, you can use the content of more than one website with different setups from the content management application.
Yes, you can create your content within the Intranet and publish it only for your staff.
Yes, you can turn comments on and off on any content you want.
Yes, you can back up all your content and documents in it by using your Import / Export feature from the transfer wizard.
You can also take the entire Aidango backup using the Control Panel app.