Maria,
You don't have to use their data. The Asset Package is only a use case of what can be done. I'm on a project at the moment for a Electricity Distribution Utility and we are creating our own version of the Asset Package as the Esri Inc demo isn't suitable for Australian Electricity Utilities. We are redefining all aspects of the package (eg. asset group, asset type, attributes, containment rules, connectivity rules, etc.)
