Using NW6.5sp1a Client4.09sp1a ZfD4.0 (Win2K on desktops)

This is driving me nuts! We can use iManager to install and uninstall
printers to users and user groups but we cannot do the same for workstations
or WS groups (actually what we want to do). Even setting an iPrint policy
in Zen cannot work. Is there an error log anywhere? Should we be using or
Zen, iManager (iPrint RPM)?

Things I have tried - installing iPrint and ZfD agents on WStations; making
the tree a trustee of the policy; making a workstation group in the user
container (the user container naturally contains the users). Associating
the WS Group with the WS policy.