ZfD7, NW6.5SP5

I have a situation where a user (DLU Power User) with a laptop goes to a
client site and wants to install a local printer via the USB port. WinXP
tells them they must belong to the Administrator group to install the
the printer. I've created a custom DLU which includes the "Load and
Unload drivers" and associated it to the user, but that didn't work. I
also tried setting it in the Security policy for the workstation to no
Is it even possible to allow a Power User to install local printers?