Hi AlBer,
If you're a subscriber who has downloaded the CD image, there are a few .bak files within the CD image. The CoreAndSolutions120.bak is a database backup of a base configuration of Aras Innovator. This means that only default applications are installed, and no data has been created. This is the easiest way to achieve what I believe you're looking for.
If you're not a subscriber, I'd recommend installing a new instance of innovator, and taking a backup of that database as soon as it's created. This will essentially provide you with an identical database as the procedure above.
AJ