...
Open the Start Menu.
Select the Control Panel.
Select Devices and Printers.
Right-click on the printer you would like to add your user code to, and select Printing Preferences.
Select the Detailed Setting tab.
Select Job Setup.
Enter your user code in the User Code field.
To save your code as a preset, select Register Current Settings, give your preset a name, and then press OK.
Select the Apply button, then press OK.
...