Perhaps this should be added to the MSXML FAQ at
netcrucible? I asked this recently and know I
answered this same question a few days later...

The answer is no (frome someone at Microsoft).
MS did not implement extension elements (which
is optional in the standard) and so does not
include a way to output multiple files.

Sara

Thank you for your answer, which confirmed what I tought :
following the mailing list precept, "no answer is no solution"...