I'm using the CreateUserWizard and the ASPNETDB.mdf database.
If I create a new database table I would like to create a relationship between the aspnet_Membership table and my new Orders table.
I'm not sure how to do this. Would I need to get the UserID for the new created members and place that in the new table as a foreign key?

any help would be appreciated.
thanks.

Create a Foreign Key constraint in your Orders table referencing the MemberID to tie the member to a specific order.