Well, this is partially true. You cannot record the actual XML Mapping file required by eC1XML Tools, but you can view the XML file used by Centerstone for any import done from within the application. This is very helpful when trying to troubleshoot issues or when trying to get the actual field names in use by eC1XML.
Simply perform an Import within Centerstone. Then go to the applicable application server and pull the .xml file from the ../BEA/XML/ directory.
Attached is a random file pulled from devappsrv01 to show the naming convention and the contents. At the time this file was pulled there were xml files going back 3 months on this server.