Command line to change Printer Port

Hi All,
We have a network printer in our classrooms.  We need to change the subnet, which will be done via DHCP.  I need all the workstations to point to the new network printer IP address port.  The printer is currently installed on each workstation so I just need to add the port and force the printer to use the newly added port.

Please advise how to do this via command line.  I have PSEXEC installed.  

Thank you in advance.
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Lionel MMSmall Business IT ConsultantCommented:
you can use the command rundll32 printui.dll using the /r switch along with the ip address see here for explanation

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