Non-admin users on XP clients unable to install iPrint printers.

Error message: Access is denied
Error group: Windows
Error code: 5

I saw an earlier post regarding this, after unsuccessfully trying to
users to various local groups - someone made a reference to NW SP3
options to install as system vs. user printers. Does anyone know if
this is
the case? Any other workarounds?

NDPS printers install successfully, the problem is limited to iPrint

Thank you,
Craig Roberts