Hi Andrew,
If I understand right you want to duplicate the data source, graphic view and watch list for another site within the same instance of Mango.
Each point has a device name which is different than the data source. You can edit the device name on the point details settings. By default the device name is set to the name of the data source but if you change the name of the data source it doesn't change the device name.
There have been a few improvements in Mango Automation 2.0 from the version f M2M2 that you are using. When you copy a data source you can choose the new data source name and device names before it is created. You can also copy graphic views. You would still need to edit the new graphic view for the new data points. We also have the DGLux dashboards where you could have one dashboard set up for a site and then with a button you could change which site the dashboard displays. So it's one view that changes the data feed.
You can get the new files and test them out if you want at:http://infiniteautomation.com/index.php/downloads-categore-list.html if you like them you can then upgrade, just make sure you back everything up before you upgrade in-case something goes wrong in the process.
Joel.