Earlier I did describe how to duplicate an installed and existing database in post "How to install more than one Dynamics NAV 2009 Demo Database". This time I will attached the DB directly from DVD.The steps is as follow
You need to ensure that the SQL server user have correct permissions to ‘C:\Program Files (x86)\Microsoft Dynamics NAV\60\Database - Copy\' or where you put the db files. I'm using ‘NETWORK SERVICE" as the SQL server user account, the NAV will use this account by default when doing demo installation.
To set permission