PDO and Layaway orders from Siebel

HI All,

Is there any process of importing orders similar to PDO and Layway orders into POS form Siebel.

We are creating Orders in Siebel which is fully paid or partially paid.  We need to fulfill the orders in ORPOS.  Reservation functonality whould work similar to PDO and Layway orders.  Inventory should be reserved on order creation and depleted on fulfillment.

REgards, Chandru