I am trying to add an HP4200TN printer, attached as a
local printer to an XP client, across an NT 4.0 network in
a domain.

The XP client trying to add the attached printer receives
a message indicating that "system policy" prevents me from
adding this printer.

The User account has full administrative rights. How can
I change this "system policy" to allow addition of a local
printer shared on the domain?

Other workstations can add the printer with no problems.