Upload Records from Excel and maintain Form/Sub-Form relationship

Upload Records from Excel and maintain Form/Sub-Form relationship

I want to create a form for Customers with a Contacts sub-form. I have all of the Customers and related Contacts in Excel to migrate to Creator. How can I upload into Creator so the relationships stay in tact? Can this be done? Will they maintain the same relationship format as if I am adding a new record from the form input?