Hans,
you guessed right. i'm probably the only one needing this...
it's still related to that export thing i'm busy with.
the exported wall with a window looks like this:

wall_4314321
wall_4324324
sweethome_windowpane_
...
...
(something french)
..
..
(even more french)
wall_32432423

etc.etc.

and guess what: with more windows in one wall it gets totally crazy.
if i could export the windows later, it would be much easier to re-group everything - of course only for me.
macfrog