You can run the aspnet_regsql.exe executable without any command-line arguments to run a wizard that will help you with specifying ...

You can run the aspnet_regsql.exe executable without any command-line arguments to run a wizard that will help you with specifying connection information for SQL Server and installing or removing the database elements for all supported features. You can also run the aspnet_regsql.exe executable as a command-line utility to configure database elements for individual features.