Any Adminstration wanting to use the N-Euro system should send an email to firstname.lastname@example.org
Once it has been established that they are a true bona fide public administration, they would then be given administrator status for the N-Euro platform. This would allow them to open accounts for all the individuals and businesses that they would like to include in the system.
New account holders would then activate their accounts by clicking on a link provided in a mail.
From then on, the Administration could start paying people for their work, or providing goods and services, by transferring N-Euros to their accounts.
Once there are N-Euros in the system, they can be used by account holders to pay for work, or goods and services provided by other people and businesses registered on the network.
The key to giving the N-Euros value would be to allow them to be used for paying taxes or for obtaining other services provided by the Administration. If the Administration was normally charging people taxes denominated in conventional Euros, but decreed that it would also accept payment with N-Euros at parity, this would mean that 1 Euro = 1 N-Euro.
That's literally all that is needed to give a currency value.