Trying to create a payment flat file using one document (check) number for multiple invoices without

Attempting to create an output file for ePayables that provides multiple invoices against one document (check) number.  The multiple listing will be per vendor to provide individual line items when the flat file is passed onto the receiving Financial institution.  When I attempted to create a payment file all invoices are combined and one line item is created on the output file.  The I utilized the "pay alone" function, this creates multiple document (check) numbers for each individual invoice per vendor.

An option might be to create script on the payment template to repeat invoice until new document (check) number is encountered.