Bulk Load of EFT Setup Data?

We are going to be collecting numerous of customers EFT setup data to support pre-authorized debit payments. Upon discussing with a Lawson Engineer - it was suggested: 1) At Conversion Time: Use AR501 (Customer Conversion) - uses staging table ARCCUST - this wil work nicely (and I've tested) - just include EFT setup data with the rest of the customer data @ conversion. 2) Post Go-Live: was suggested to use AR550 (Customer Interface) - uses staging table ARICST - I DO NOT want to alter any of the existing Customer data - but rather - just bulk-load the EFT setup data for numerous existing Customers - in attempting to test - getting the error message: "Cust Cannot enter EFT information on Change action" -------------------------------------------------------------------------- Anyone have any experience here? ALSO: I know which tables the EFT setup data is populating: FTCUSTNOTE & DTCUSTBANK - anyone have any experience just hitting these tables via a "back-door"??