This is a perl tool that produces a NAB-file of NetMail addressbooks and NetMail lists for import into GroupWise.
You need perl to make the script run. I used Active perl and set it up on a network volume. Add the script to a place where users have read rights. You will also need to modify the scripts to adapt them to your environment. I.E. replace search paths and change default domainnames.
In our environment I wrote a wrapping script that first runs the script and then opens the folder which contains the converted files. The user just needs to doubleclick on the file and choose the Addressbook which will receive the import.