I have installed 2 versions of Office to test: 6.0 and 2003.
Both I can open besides each other and through there I can adapt all documents I need but if I use Windows explorer and browse to the map containing the documents, they will all open in the latest Office version.
I have tried to adjust the 'Open with' for doc and xls and then select the old word/excel version but it keeps opening in the newest version.
I even tried adjusting the File types doc en xls to open the file using the old version but that doesn't work either.

Does anyone know a trick how to (automaticly) use the old version?