Update automatically warehouse with each order

I'm migrating from Ubercart to Magento, in the old system the stocks and shipping updated automatically in the main warehouse. Just I sent from drupal a xml with the client info and order details. ¿Someone can help me? regards, Alfredo Example xml generated to send to warehouse <?xml version="1.0" encoding="ISO-8859-1"?><OrderList MerchantName="Collections" MerchantId="3118"><Order id="2961"><AddressInfo type="ship"><Name>Sadh Bliner</Name><Company></Company><Address1>17 Stonewall Dr</Address1><Address2></Address2><City>Livingston </City><State>New Jersey</State><Country>US</Country><Zip>07039</Zip><Phone>97444775948</Phone><Email></Email></AddressInfo><AddressInfo type="bill"><Name>Sarah Bliner</Name><Company></Company><Address1>17 Stonewall Dr</Address1><Address2></Address2><City>Livingston </City><State>New Jersey</State><Country>US</Country><Zip>07039</Zip><Phone>9734775948</Phone><Email></Email></AddressInfo><ShippingMethod>UPS GROUND</ShippingMethod><Deliver>Residential</Deliver><ShippingMerchant>Alpaca Collections</ShippingMerchant><Signature>SIG2</Signature><Greeting>Thank you for your order!</Greeting><Note></Note><Item num="0"><ProductId>3118-110197</ProductId><Quantity>1</Quantity><Unit-Price>77.00</Unit-Price></Item><Item num="1"><ProductId>3118-104613</ProductId><Quantity>1</Quantity><Unit-Price>60.00</Unit-Price></Item><Totals><Shipping>0.00</Shipping><Tax>0.00</Tax><SubTotal>37.00</SubTotal><GrandTotal>37.00</GrandTotal></Totals></Order></OrderList>