Thanks guys,
But I can't see txt nor rtf in the format box when exporting.
I did stumble upon this:
http://www.rorohiko.com/textexporter.html
It's a free plugin to export all text as a single rtf, txt or indesign tagged text file.
I guess with the tagged text it has to be possible to get everything placed back automatically. But I still need to figure out just how that works...
Thanx for your help!!!