New GW fields in user address book (not system)

There is a need for some new fields in GroupWise.

I followed TID 3741418 (although not for 8, it worked) and the Administration Guide here and here.

The fields are there, perfect. But only in the System Address Book. Not perfect, because this is useless for our purpose. The new fields are needed for external addresses.

Is there a way to edit the fields in user addressbooks, all at once, like for the system address book?

Thank you for any suggestions.