Business Scenario: Multiple Payment modes at Order Header level.

Scenario 1:

For a given single Sales Order if the Customer wants to pay partial amount in prepayment mode and rest of the amount with Net 30.

Scenario 2:

For a given single Sales Order, Customer want to pay partial amount by using Credit card and remaining amount by using Net 30.

How we can capture these payment information along with respective amounts at the Order Header level ? I know we can different payment terms at line level but the scenario here is at Order level he want to Prepay or Authorize partial amount and he want pay rest of the amount in Net30.