Where is my aspnetdb file?

So, I am trying to implement a login control.
I am running Windows Vista, SQL Server 2005 Enterprise, Visual Studio 2005 and running .NET version 3.5
 
I have all the service packs and updates
I Have gone into the ASP.NET configuration and have added users and roles but there is no aspnetdb database file anywhere, but it has the users and passwords stored somewhere.
 
Anyways, I went through these video tutorials and one tutorial showed a way to create the aspnetdb database file, which was to go into the following directory:
 
C:\Windows\Microsoft.NET\Framework\v2.0.50707 and ran the following file:
aspnet_regsql
 
I ran this file, which went through all the steps but then did not connect, ah I forgot good ol Vista, to run as admin so I ran as admin, then went through all the steps like in the microsoft tutorial and then it said database was created, just like in the tuto ...