I'm testing on Nw6.5sp4a, iPrint client v4.12 and iManager v2.5

I can't seem to get the switch as documented in TID2973169 to work. After
installing the correct NDPSM.NLM and reloading it with the switch, I then
set the print agent to medium security and remove all users from the user
role (under Access Control tab). Theoretically, this should prevent anyone
from printing to that printer. I re-push the driver down to the test
workstation from http://server/ipp and was still able to print. Firstly, I
should not be able to install the driver and secondly, I should not be able
to print.

Has anyone had success with this switch? How would you go about
troubleshooting it?