eText Template - is it possible to create dynamic variables and dynamic record?

Hi,

We have a eText Outbound template to generate the BACS payments file, i want to know whether it's possible to create dynamic variables and create a record inbetween records supplied in XML file.

e.g. XML file has data
<OutboundPayment1>
<OutboundPayment2>
<OutboundPayment3>
<OutboundPayment4>

here first 3 records paid from one Bank and last payment is paid from different Bank, so we wanted to generate a eText output as below

Payment1 100.00 Bank1
Payment2 200.00 Bank1
Payment3 300.00 Bank1
Bank1 600.00
Payment4 400.00 Bank2
Bank2 400.00

here we need to calculate the running total of all payments paid from Bank1 and add it as a record after listing all the payments paid by that bank account