Have you run into this problem? In Quickbooks Point of Sale v10 (or in various versions of Quickbook proper it appears) you might change over to the Shipping Manager and when you try and print you get the following error:
Printer Not found: ::{21EC2020-3AEA-1069-A2DD-08002B30309D}\::{2227A280-3AEA-1069-A2DE-08002B30309D}\HP Laser
This appears to happen under Windows and may happen under Vista as well. The printers are properly configured in QBPOS (or in QB) but for some reason the Shipping Manager isn’t properly enumerating the name of the printer from QBPOS (or QB) configuration.