XMLA Process Database how to set Transaction Mode

We use SSAS 2005 and the Customer Analysis Services Database is processed during the night with a XMLA Command in a SQL SQL Server Agent Task step.

The command i use is:

 Process xmlns="http://schemas.microsoft.com/analysisservices/2003/engine">
  <Object>
    <DatabaseID>CustomerDB</DatabaseID>
  </Object>
  <Type>ProcessFull</Type>
  <WriteBackTableCreation>UseExisting</WriteBackTableCreation>
</Process>

As i understand this command uses as Default the Transaction Mode: "One Transaction". How can i alter the XMLA Command so that the Transaction Mode "Separate Transactions" is used?

Is this possible?

Best Regards
Paolo Taverna