Export Access tables back out to XML

I have an XML document from another database that I can successfully
import into Access. There are multiple tables and they all parse
correctly into those tables in Access. I can manipulate the data
elements I need to modify. Now I would like to export all of those
tables back out in one XML document to be re-imported back into the
source database. I seem to be able to only export one Access table at
a time.

Any ideas how I can put the whole XML document back together again?

TIA
N