R12 Payment (Overflow -setup)

Hi We are upgrading from 11i to R12.1.3 and need help like how we can implement overflow concept in R12 Payment and where is the setup since in R12 payment we have XML tempalte which attach to Format and then format attached to Payment-Process-Profile and also format attached to payable-dcoument under bank-account, so where we have setup option for overview. We need, like if we setup overflow 10 and while making the payment if suppose there are 15 invoices to be paid so for first 10 invoices check should be void and for remaining 5 invoices new check should be issue