ms access outer join to xml

Question

Is there an easy way to produce efficient xml from ms access from an outer join?

ie, instead of repeated rows i'd like multiple subkeys

so from joining a customer table with an order table,

<customer>
 <custId>1</custId>
 <order>
  <orderId>1</orderId>
  <orderId>2</orderId>
 </order>
</customer>

instead of

<customer>
 <custId>1</custId>
 <order>
  <orderId>1</orderId>
 </order>
</customer>
<customer>
 <custId>1</custId>
 <order>
  <orderId>2</orderId>
 </order>
</customer>