How to do it...

1. Add the print driver for the new printing device:

      Add-PrinterDriver -Name 
               'HP LaserJet 9000 PS Class Driver'

1. Get the Sales Group printer object and store it in $Printer:

      $Printer = Get-Printer -Name SGCP1

1. Update the driver using the Set-Printer cmdlet:

      Set-Printer -Name $Printer.Name
                  -DriverName 'HP LaserJet 9000
                                PS Class Driver'

1. Observe the results:

      Get-Printer -Name SGCP1 `
                  -ComputerName PSRV