Hi there,
There are a few ways to do this:
1. Attach your MDB to SQL Server Express, run the wizard against the attached database and then detach.
2. Provide a connection string to the aspnet_regsql that points to your MDF file.
For both scenarios, Google has a lot more info:
http://www.google.com/search?hl=en&s...l=&oq=&gs_rfai=
Cheers,
Imar