how to set payment method to new order by code [closed]

Question

I have payment method:

$paymentmethods = Mage::getModel('marketplace/paymentmethods');
            $paymentmethods->load(1);

and new order:

$order = Mage::getModel('sales/order')
    ->setIncrementId($reservedOrderId)
    ->setStoreId($storeId)
    ->setQuoteId(0);

how can i add payment method information with id = 1, to my new order? is it possible?