No worries — thanks for your help to date.

Actually all I really need is a macro/action that simply sends the four commands Shift-Cmd-S, Enter, Cmd-R, Cmd-W that I can run over and over until all the windows are closed. I can probably figure out how to do that myself sometime.

Thanks again.

Oh Kasyan, how incredibly kind of you! I'll try it at work tomorrow.

Damn, just realized, I really need it to save over the old one. Just as if the document was already open and you went, Save-as, Enter, Replace. The reason for this is that the Indesign files have been found via a spotlight search – it would take a long time to find each original and replace it with the new 'Saved-As' file.

Thanks a bunch though – what a generous community!