This video will give you step by step directions on how to add an MSP Super User. You would want to add your own staff at an MSP as Super User Administrators to help administer CyberHoot for your MSP clients. You must be a Super User yourself to be able to add another Super User.
Super Users may switch between Clients with the click of a button. Simply login, select Admin => Deployment and then the Switch Customer Icon. Hover your mouse over the icons to identify the correct one.